14,705,884 Shares INFRASOURCE SERVICES, INC. Common Stock UNDERWRITING AGREEMENT

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Exhibit 1.1

14,705,884 Shares

INFRASOURCE SERVICES, INC.

Common Stock

UNDERWRITING AGREEMENT

, 2004

▇▇▇▇▇▇ BROTHERS INC.
▇▇▇▇▇▇▇ LYNCH, PIERCE, ▇▇▇▇▇▇ & ▇▇▇▇▇ INCORPORATED
BEAR ▇▇▇▇▇▇▇ & CO. INC.
▇.▇. ▇▇▇▇▇▇▇▇ & CO.
FIRST ALBANY CAPITAL INC.
▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇ & CO., INCORPORATED
As Representatives of the
several underwriters named in Schedule 1 hereto
c/▇ ▇▇▇▇▇▇ BROTHERS INC.
▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇
▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇

Ladies and Gentlemen:

InfraSource Services, Inc., a Delaware corporation (the "Company"), proposes to sell 7,352,942 shares (the "Company Firm Stock") of the Company's Common Stock, par value $.001 per share (the "Common Stock"), and certain stockholders of the Company named in Schedule 2 hereto (each, a "Selling Stockholder" and, together the "Selling Stockholders") propose to sell an aggregate of 7,352,942 shares of the Common Stock (the "Selling Stockholder Firm Stock" and, together with the Company Firm Stock, the "Firm Stock"). In addition, the Selling Stockholders propose to grant to the Underwriters named in Schedule 1 hereto (the "Underwriters") an option to purchase up to an additional 2,205,883 shares of the Common Stock on the terms and for the purposes set forth in Section 3 (the "Option Stock"). The Firm Stock and the Option Stock, if purchased, are hereinafter collectively called the "Stock." This is to confirm the agreement concerning the purchase of the Stock by the Underwriters from the Company and the Selling Stockholders.

SECTION 1. Representations, Warranties and Agreements of the Company. The Company represents, warrants and agrees with the several Underwriters that:

(a) A registration statement on Form S-1 with respect to the Stock has (i) been prepared by the Company in conformity with the requirements of the Securities Act of 1933, as amended (the "Securities Act"), and the rules and regulations (the "Rules and Regulations") of the United States Securities and Exchange Commission (the "Commission") thereunder, (ii) been filed with the Commission under the Securities Act and (iii) become effective under the Securities Act. Copies of such registration statement and each of the amendments thereto have been delivered by the Company to you as the representatives (the "Representatives") of the Underwriters. As used in this Agreement, "Effective Time" means the date and the time as of which such registration statement, or the most recent post-effective amendment thereto, if any, was declared effective by the Commission; "Effective Date" means the date of the Effective Time; "Preliminary Prospectus" means each prospectus included in such registration statement, or amendments thereof, before it became effective under the Securities Act and any prospectus filed with the Commission by the Company with the consent of the Representatives pursuant to Rule 424(a) of the Rules and Regulations; "Registration Statement" means such registration statement, as amended at the Effective Time, including all information contained in the final prospectus filed with the Commission pursuant to Rule 424(b) of the Rules and Regulations and deemed to be a part of the registration statement as of the Effective Time pursuant to Rule 430A

of the Rules and Regulations; and "Prospectus" means the prospectus in the form first used to confirm sales of Stock. If the Company has filed an abbreviated registration statement to register additional shares of Common Stock pursuant to Rule 462(b) under the Securities Act (the "Rule 462 Registration Statement"), then any reference herein to the term "Registration Statement" shall be deemed to include such Rule 462 Registration Statement. The Commission has not issued any order preventing or suspending the use of any Preliminary Prospectus.

(b) As of the Effective Time, the Registration Statement conformed, and the Prospectus and any further amendments or supplements to the Registration Statement or the Prospectus will, when they become effective or are filed with the Commission, as the case may be, conform in all material respects to the requirements of the Securities Act and the Rules and Regulations and did not and will not, as of the applicable effective date (as to the Registration Statement and any amendment thereto) and as of the applicable filing date (as to the Prospectus and any amendment or supplement thereto) contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading (with respect to the Prospectus, in light of the circumstances under which they were made); provided that no representation or warranty is made as to information contained in or omitted from the Registration Statement or the Prospectus in reliance upon and in conformity with written information furnished to the Company through the Representatives by or on behalf of any Underwriter specifically for inclusion therein it being understood and agreed that the only such information is that described as such in Section 10(f) of this Agreement.

(c) The Company and each of its subsidiaries (as defined in Section 17) have been duly incorporated, in the case of the Company and each subsidiary that is a corporation, or organized, in the case of each subsidiary that is not a corporation, and are validly existing as corporations or entities in good standing under the laws of their respective jurisdictions of incorporation or organization, are duly qualified to do business and are in good standing as foreign corporations or other entities in each jurisdiction in which their respective ownership or lease of property or the conduct of their respective businesses requires such qualification, except to the extent that the failure to be so qualified or be in good standing would not reasonably be expected to have a Material Adverse Effect (as defined herein), and have all power and authority necessary to own or hold their respective properties and to conduct the businesses in which they are engaged.

(d) The Company will have, immediately after the consummation of the offering, an authorized capitalization as set forth in the Prospectus under the caption "Description of Capital Stock." All of the issued shares of capital stock of the Company have been duly and validly authorized and issued, were issued in compliance in all material respects with federal and state securities laws, are fully paid and non-assessable and conform in all material respects to the description thereof contained in the Prospectus under the caption "Description of Capital Stock." All of the Company's options, warrants and other rights to purchase or exchange any securities for shares of the Company's capital stock have been duly and validly authorized and issued, were issued in material compliance with federal and state securities laws, and conform in all material respects to the description thereof contained in the Prospectus. All of the issued shares of capital stock or other equity interests, as applicable, of each subsidiary of the Company have been duly and validly authorized and issued and are fully paid and, with respect to each subsidiary that is a corporation, are non-assessable, and, except as described in the Prospectus, are owned directly or indirectly by the Company, free and clear of all liens, encumbrances, equities or claims.

(e) The shares of the Stock to be issued and sold by the Company to the Underwriters hereunder have been duly and validly authorized and, when issued and delivered against payment therefor in accordance with this Agreement, will be duly and validly issued, fully paid and non-assessable; and the Stock will conform in all material respects to the descriptions thereof contained in the Prospectus under the caption "Description of Capital Stock." Upon payment for and delivery of the Stock to be

sold by the Company pursuant to this Agreement, the Underwriters will acquire such Stock, free and clear of all liens, encumbrances, equities, preemptive rights, subscription rights, other rights to purchase, voting or transfer restrictions and other claims.

(f) This Agreement has been duly authorized, executed and delivered by the Company.

(g) The execution, delivery and performance of this Agreement by the Company and the consummation of the transactions contemplated hereby will not (i) conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries is bound or to which any of the property or assets of the Company or any of its subsidiaries is subject, nor (ii) will such actions result in any violation of the provisions of (A) the charter or by-laws of the Company or any of its subsidiaries or (B) any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its subsidiaries or any of their properties or assets except, in the case of clauses (i) and (ii)(B), such conflicts, breaches, violations or defaults as would not reasonably be expected to have a Material Adverse Effect; and except for the registration of the Stock under the Securities Act and such consents, approvals, authorizations, registrations or qualifications as have been obtained or as may be required under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the National Association of Securities Dealers, Inc. (the "NASD") or applicable state securities laws in connection with the purchase and distribution of the Stock by the Underwriters, no consent, approval, authorization or order of, or filing or registration with, any such court or governmental agency or body is required for the execution, delivery and performance of this Agreement by the Company and the consummation of the transactions contemplated hereby.

(h) Except as described in the Prospectus, there are no contracts, agreements or understandings between the Company and any person granting such person the right to require the Company to file a registration statement under the Securities Act with respect to any securities of the Company owned or to be owned by such person or to require the Company to include such securities in the securities registered pursuant to the Registration Statement.

(i) Except as described in the Prospectus, the Company has not sold or issued any shares of Common Stock during the six-month period preceding the date of the Prospectus, including any sales pursuant to Rule 144A under, or Regulations D or S of, the Securities Act other than shares issued pursuant to employee benefit plans, qualified stock options plans or other employee compensation plans or pursuant to outstanding options, rights or warrants.

(j) Neither the Company nor any of its subsidiaries has sustained, since the date of the latest audited financial statements included in the Prospectus, any material loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, otherwise than as set forth or contemplated in the Prospectus; and, since such date, there has not been any change in the capital stock or long-term debt of the Company or any of its subsidiaries or any material adverse change, or any development involving a prospective material adverse change, in or affecting the general affairs, management, consolidated financial position, stockholders' equity, results of operations, business or prospects of the Company and its subsidiaries taken as a whole, in each case otherwise than as set forth or contemplated in the Prospectus.

(k) The financial statements (including the related notes and supporting schedules) filed as part of the Registration Statement or included in the Prospectus present fairly in all material respects the financial condition and results of operations of the entities purported to be shown thereby, at the dates and for the periods indicated, and have been prepared in conformity with generally accepted accounting principles applied on a consistent basis throughout the periods involved (except as disclosed therein). The assumptions used in preparing the pro forma financial statements included in the

Registration Statement and the Prospectus provide a reasonable basis for presenting the significant effects directly attributable to the transactions or events described therein, on the basis and subject to the limitations set forth therein, the related pro forma adjustments give appropriate effect to those assumptions, and the pro forma columns therein reflect the proper application of those adjustments to the corresponding historical financial statement amounts in all material respects.

(l) PricewaterhouseCoopers LLP, who have certified certain financial statements of the Company, whose report appears in the Prospectus and who have delivered the letters referred to in Section 9(f) and 9(g) hereof, are independent public accountants as required by the Securities Act and the Rules and Regulations.

(m) The Company and each of its subsidiaries have good and marketable title to all real property and good and marketable title to all personal property owned by them, in each case free and clear of all liens, encumbrances and defects, except such as are described in the Prospectus or such as do not materially affect the value of such property taken as a whole and do not materially interfere with the use made and proposed to be made of such property taken as a whole by the Company and its subsidiaries; and all assets held under lease by the Company and its subsidiaries are held by them under valid and enforceable leases, except where the failure to be so valid and enforceable would not reasonably be expected to have a Material Adverse Effect.

(n) The Company and each of its subsidiaries carry, or are covered by, insurance in such amounts and covering such risks as is commercially reasonable for the conduct of their respective businesses.

(o) The Company and each of its subsidiaries own or possess adequate rights to use all material patents, patent applications, trademarks, service marks, trade names, trademark registrations, service ▇▇▇▇ registrations, copyrights and licenses (collectively, the "Intellectual Property") necessary for the conduct of their respective businesses and are not aware that the conduct of their respective businesses conflict with, and have not received any notice of any claim of conflict with, any such rights of others, except as would not reasonably be expected to have a Material Adverse Effect.

(p) Except as described in the Prospectus, there are no legal or governmental proceedings pending to which the Company or any of its subsidiaries is a party or of which any property or assets of the Company or any of its subsidiaries is the subject which, if determined adversely to the Company or any of its subsidiaries, would have a material adverse effect on the general affairs, management, consolidated financial position, stockholders' equity, results of operations, business or prospects of the Company and its subsidiaries taken as whole (a "Material Adverse Effect"); and to the best of the Company's knowledge, no such proceedings are threatened or contemplated by governmental authorities or threatened by others.

(q) No relationship, direct or indirect, exists between or among the Company on the one hand, and the directors, officers, stockholders, customers or suppliers of the Company on the other hand, which is required to be described in the Prospectus which is not so described. The Company does not currently and will not at any Delivery Date, directly or indirectly, including through any subsidiary, extend or maintain credit, or arrange for the extension of credit, in the form of a personal loan to or for any of its directors or executive officers.

(r) No labor disturbance by the employees of the Company exists or, to the knowledge of the Company, is imminent, in each case, that would reasonably be expected to have a Material Adverse Effect.

(s) The Company is in compliance in all material respects with all presently applicable provisions of the Employee Retirement Income Security Act of 1974, as amended, including the regulations and published interpretations thereunder ("ERISA"); no "reportable event" (as defined in ERISA) has occurred with respect to any "pension plan" (as defined in ERISA) for which the Company would have any material liability; the Company has not incurred and does not expect to incur any material liability

under (i) Title IV of ERISA with respect to the termination of, or withdrawal from, any "pension plan" or (ii) Sections 412 or 4971 of the Internal Revenue Code of 1986, as amended, including the regulations and published interpretations thereunder (the "Code"); and each "pension plan" for which the Company would have any liability that is intended to be qualified under Section 401(a) of the Code is so qualified and nothing has occurred, whether by action or by failure to act, which would cause the loss of such qualification.

(t) The Company has filed all material federal, state and local income and franchise tax returns required to be filed through the date hereof and has paid all material taxes due thereon other than those payable without interest or penalty or being contested in good faith by appropriate proceedings and for which adequate reserves have been established in accordance with GAAP, and the Company does not have any knowledge of any tax deficiency which, if determined adversely to the Company or any of its subsidiaries, would reasonably be expected to have a Material Adverse Effect.

(u) Since the date as of which information is given in the Prospectus through the date hereof, and except as may otherwise be disclosed in the Prospectus, the Company has not (i) issued or granted any securities, (ii) incurred any liability or obligation, direct or contingent, other than non-material liabilities and obligations which were incurred in the ordinary course of business, (iii) entered into any material transaction not in the ordinary course of business or (iv) declared or paid any dividend on its capital stock.

(v) The Company maintains internal accounting controls which provide reasonable assurance that (A) transactions are executed in accordance with management's authorization, (B) transactions are recorded as necessary to permit preparation of its financial statements and to maintain accountability for its assets, (C) access to its assets is permitted only in accordance with management's authorization and (D) the reported accountability for its assets is compared with existing assets at reasonable intervals.

(w) Neither the Company nor any of its subsidiaries (i) is in violation of its charter or by-laws, (ii) is in default in any material respect, and no event has occurred which, with notice or lapse of time or both, would constitute such a default, in the due performance or observance of any term, covenant or condition contained in any material indenture, mortgage, deed of trust, loan agreement or other material agreement or instrument to which it is a party or by which it is bound or to which any of its properties or assets is subject or (iii) is in violation in any material respect of any law, ordinance, governmental rule, regulation or court decree to which it or its property or assets may be subject or has failed to obtain any material license, permit, certificate, franchise or other governmental authorization or permit necessary to the ownership of its property or to the conduct of its business.

(x) Neither the Company nor any of its subsidiaries, nor to the Company's knowledge, any director, officer or employee of the Company or any of its subsidiaries, has used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; made any direct or indirect unlawful payment to any foreign or domestic government official or employee from corporate funds; violated or is in violation of any provision of the Foreign Corrupt Practices Act of 1977; or made any bribe, rebate, payoff, influence payment, kickback or other unlawful payment.

(y) There has been no storage, disposal, generation, manufacture, refinement, transportation, handling or treatment of toxic wastes, medical wastes, hazardous wastes or hazardous substances by the Company or any of its subsidiaries (or, to the knowledge of the Company, any of their predecessors in interest) at, upon or from any of the property now or previously owned or leased by the Company or its subsidiaries in violation of any applicable law, ordinance, rule, regulation, order, judgment, decree or permit or which would require remedial action under any applicable law, ordinance, rule, regulation, order, judgment, decree or permit, except for any violation or remedial action as would not reasonably be expected to have a Material Adverse Effect; there has been no material spill, discharge, leak,

emission, injection, escape, dumping or release of any kind onto or from such property of any toxic wastes, medical wastes, solid wastes, hazardous wastes or hazardous substances due to or caused by the Company or any of its subsidiaries or with respect to which the Company or any of its subsidiaries have knowledge, except for any such spill, discharge, leak, emission, injection, escape, dumping or release as would not reasonably be expected to have a Material Adverse Effect. The terms "hazardous wastes," "toxic wastes," "hazardous substances" and "medical wastes" shall have the meanings specified in any applicable local, state, federal and foreign laws or regulations with respect to environmental protection.

(z) Neither the Company nor any subsidiary is, and after giving effect to the offering and sale of the Company Firm Stock and the application of the proceeds thereof as described in the Prospectus will be, an "investment company" within the meaning of the Investment Company Act of 1940, as amended, and the rules and regulations of the Commission thereunder.

(aa) There are no contracts, agreements or understandings between the Company and any person that would give rise to a valid claim against the Company or any Underwriter for a brokerage commission, finder's fee or other like payment in connection with this offering.

(bb) The statistical and market-related data included in the Prospectus and the Registration Statement are based on or derived from sources which the Company reasonably believes to be reliable and accurate in all material respects.

(cc) The Company is not aware of (i) any significant deficiency in the design or operation of internal controls which could materially adversely affect the Company's ability to record, process, summarize and report financial data or any material weaknesses in internal controls; or (ii) any fraud that involves management or other employees who have a significant role in the Company's internal controls; nor is the Company aware that the Board of Directors or the audit committee has been informed of any of the conditions described in clauses (i) and (ii) above.

(dd) Except as described in the Prospectus, there are no material off-balance sheet arrangements (as defined in Regulation S-K Item 303(a)(4)(ii)), that would reasonably be expected to have a Material Adverse Effect.

SECTION 2. Representations, Warranties and Agreements of the Selling Stockholders. Each Selling Stockholder severally and not jointly warrants and agrees with the several Underwriters that:

(a) The Selling Stockholder has, and immediately prior to the applicable Delivery Date (as defined in Section 5) the Selling Stockholder will have, valid title to the Stock to be sold by the Selling Stockholder hereunder on such date, free and clear of all liens, encumbrances, equities or claims (except for such claims as may arise under this Agreement or the Irrevocable Power of Attorney and Custody Agreement entered into in connection herewith); and upon delivery of such shares and payment therefor pursuant hereto, the several Underwriters will acquire valid title to such shares, free and clear of all liens, encumbrances, equities or claims.

(b) The Selling Stockholder has placed in custody under an Irrevocable Power of Attorney and Custody Agreement (the "Custody Agreement" and, together with all other similar agreements executed by the other Selling Stockholders, the "Custody Agreements") with LaSalle Bank National Association, as custodian (the "Custodian"), for delivery under this Agreement, certificates representing the Stock to be sold by the Selling Stockholder hereunder.

(c) The Selling Stockholder has duly and irrevocably executed and delivered a power of attorney (the "Power of Attorney" and, together with all other similar instruments executed by the other Selling Stockholders, the "Powers of Attorney"), contained within the Custody Agreement, appointing the persons named therein as attorneys-in-fact, with full power of substitution, and with full authority (exercisable by any one or more of them) to execute and deliver this Agreement on such Selling

Stockholder's behalf and to take such other action as may be necessary or desirable to carry out the provisions hereof on behalf of the Selling Stockholder.

(d) The Selling Stockholder has full right, power and authority to enter into this Agreement and the Custody Agreement and the execution, delivery and performance of this Agreement and the Custody Agreement by the Selling Stockholder and the consummation by the Selling Stockholder of the transactions contemplated hereby and thereby will not (i) conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Selling Stockholder is a party or by which the Selling Stockholder is bound or to which any of the property or assets of the Selling Stockholder is subject, nor, for each Selling Stockholder that is not a natural person, (ii) will such actions result in any violation of the provisions of (A) any partnership or limited liability company agreement, certificate of incorporation, by-laws, operating agreement, deed of trust or other similar agreement or organizational document of the Selling Stockholder or (B) any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Selling Stockholder or the property or assets of the Selling Stockholder, except in the case of clauses (i) and (ii)(B) for such conflicts, breaches, violations and defaults as would not reasonably be expected to adversely affect such Selling Stockholder's ability to perform its obligations hereunder and under the Custody Agreement; and except for the registration of the Stock under the Securities Act and such consents, approvals, authorizations, registrations or qualifications as have been obtained or as may be required under the Exchange Act the NASD or applicable state securities laws in connection with the purchase and distribution of the Stock by the Underwriters, no consent, approval, authorization or order of, or filing or registration with, any such court or governmental agency or body is required for the execution, delivery and performance of this Agreement or the Custody Agreement by the Selling Stockholder and the consummation of the transactions contemplated hereby and thereby.

(e) To the knowledge of the Selling Stockholder, as of the Effective Time the Registration Statement did not and any further amendment thereto will not, as of the applicable effective date, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading, and the Prospectus and any amendment or supplement thereto will not, as of the applicable filing date and each Delivery Date, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, that, the representations and warranties in this Section 2(e) only apply to statements or omissions in the Registration Statement and the Prospectus based on and in conformity with information relating to such Selling Stockholder furnished to the Company in writing by such Selling Stockholder expressly for use therein and shall not apply to statements in or omissions from the Registration Statement or the Prospectus made in reliance upon and in conformity with information furnished to the Company in writing by any Underwriter through ▇▇▇▇▇▇ Brothers expressly for use in the Prospectus, which information is limited to the information set forth in Section 10(f).

(f) The Selling Stockholder has not taken and will not take, directly or indirectly, any action designed to or which has constituted or would reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Stock in violation of Regulation M under the Securities Act.

(g) This Agreement has been duly authorized, executed and delivered by or on behalf of the Selling Stockholder.

SECTION 3. Purchase of the Stock by the Underwriters. On the basis of the representations and warranties contained in, and subject to the terms and conditions of, this Agreement, the Company agrees to sell the Company Firm Stock, and each Selling Stockholder hereby agrees to sell the number

of shares of the Selling Stockholder Firm Stock set forth opposite its name in schedule 2 hereto, severally and not jointly, to the several Underwriters, and each of the Underwriters, severally and not jointly, agrees to purchase the number of shares of the Firm Stock set forth opposite that Underwriter's name in Schedule 1 hereto. The respective purchase obligations of the Underwriters with respect to the Firm Stock shall be rounded among the Underwriters to avoid fractional shares, as the Representatives may determine.

In addition, the Selling Stockholders grant to the Underwriters an option to purchase up to 2,205,883 shares of Option Stock. Such option is granted for the purpose of covering over-allotments in the sale of Firm Stock and is exercisable as provided in Section 5 hereof. Shares of Option Stock shall be purchased severally for the account of the Underwriters in proportion to the number of shares of Firm Stock set forth opposite the name of such Underwriters in Schedule 1 hereto. The respective purchase obligations of each Underwriter with respect to the Option Stock shall be adjusted by the Representatives so that no Underwriter shall be obligated to purchase Option Stock other than in 100 share amounts.

The price of both the Firm Stock and any Option Stock shall be $[ ] per share.

Neither the Company nor the Selling Stockholders shall be obligated to deliver any of the Stock to be delivered on any Delivery Date (as hereinafter defined), except upon payment for all the Stock to be purchased on such Delivery Date as provided herein.

SECTION 4. Offering of Stock by the Underwriters. Upon authorization by the Representatives of the release of the Firm Stock, the several Underwriters propose to offer the Firm Stock for sale upon the terms and conditions set forth in the Prospectus.

SECTION 5. Delivery of and Payment for the Stock. Delivery of and payment for the Firm Stock shall be made at the offices of ▇▇▇▇▇▇ & ▇▇▇▇▇▇▇ LLP, ▇▇▇ ▇. ▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇, at 10:00 A.M., New York City time, on the fourth full business day following the date of this Agreement or at such other date or place as shall be determined by agreement between the Representatives and the Company. This date and time are sometimes referred to as the "First Delivery Date." On the First Delivery Date, the Company shall deliver or cause to be delivered certificates representing the Company Firm Stock and each Selling Stockholder shall, severally and not jointly, deliver or cause to be delivered certificates representing the Selling Stockholder Firm Stock to be sold by it to the Representatives for the account of each Underwriter against payment to or upon the order of the Company or such Selling Stockholder, as applicable, of the purchase price by wire transfer in immediately available funds. Time shall be of the essence, and delivery at the time and place specified pursuant to this Agreement is a further condition of the obligation of each Underwriter hereunder. Upon delivery, the Firm Stock shall be registered in such names and in such denominations as the Representatives shall request in writing not less than two full business days prior to the First Delivery Date. For the purpose of expediting the checking and packaging of the certificates for the Firm Stock, the Company and each Selling Stockholder shall make the certificates representing the Firm Stock available for inspection by the Representatives in New York, New York, not later than 2:00 P.M., New York City time, on the business day prior to the First Delivery Date.

The option granted in Section 3 will expire 30 days after the date of this Agreement and may be exercised in whole or in part from time to time by written notice being given to the Company and the Selling Stockholders by the Representatives. Such notice shall set forth the aggregate number of shares of Option Stock as to which the option is being exercised, the names in which the shares of Option Stock are to be registered, the denominations in which the shares of Option Stock are to be issued and the date and time, as determined by the Representatives, when the shares of Option Stock are to be delivered; provided, however, that this date and time shall not be earlier than the First Delivery Date nor earlier than the second business day after the date on which the option shall have been exercised nor later than the fifth business day after the date on which the option shall have been exercised. The date and time the shares of Option Stock are delivered are sometimes referred to as a "Second Delivery Date" and the First Delivery Date and any Second Delivery Date are sometimes each referred to as a "Delivery Date."

Delivery of and payment for the Option Stock shall be made at the place specified in the first sentence of the first paragraph of this Section 5 (or at such other place as shall be determined by agreement between the Representatives and the Company) at 10:00 A.M., New York City time, on such Second Delivery Date. On such Second Delivery Date, each Selling Stockholder shall, severally and not jointly, deliver or cause to be delivered the certificates representing the Option Stock to be sold by it to the Representatives for the account of each Underwriter against payment to or upon the order of such Selling Stockholder of the purchase price by wire transfer in immediately available funds. Time shall be of the essence, and delivery at the time and place specified pursuant to this Agreement is a further condition of the obligation of each Underwriter hereunder. Upon delivery, the Option Stock shall be registered in such names and in such denominations as the Representatives shall request in the aforesaid written notice. For the purpose of expediting the checking and packaging of the certificates for the Option Stock, each Selling Stockholder shall make the certificates representing the Option Stock to be sold by it available for inspection by the Representatives in New York, New York, not later than 2:00 P.M., New York City time, on the business day prior to such Second Delivery Date.

SECTION 6. Further Agreements of the Company. The Company covenants and agrees:

(a) To prepare the Prospectus in a form reasonably acceptable to the Representatives and to file such Prospectus pursuant to Rule 424(b) under the Securities Act not later than the Commission's close of business on the second business day following the execution and delivery of this Agreement or, if applicable, such earlier time as may be required by Rule 430A(a)(3) under the Securities Act; to make no further amendment or any supplement to the Registration Statement or to the Prospectus except as permitted herein; to advise the Representatives, promptly after it receives notice thereof, of the time when any amendment to the Registration Statement has been filed or becomes effective or any supplement to the Prospectus or any amended Prospectus has been filed and to furnish the Representatives with copies thereof; to advise the Representatives, promptly after it receives notice thereof, of the issuance by the Commission of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or the Prospectus, of the suspension of the qualification of the Stock for offering or sale in any jurisdiction, of the initiation or threatening of any proceeding for any such purpose, or of any request by the Commission for the amending or supplementing of the Registration Statement or the Prospectus or for additional information; and, in the event of the issuance of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or the Prospectus or suspending any such qualification, to use promptly its reasonable best efforts to obtain its withdrawal;

(b) To furnish promptly to each of the Representatives and to counsel for the Underwriters a conformed copy of the Registration Statement as originally filed with the Commission, and each amendment thereto filed with the Commission, including, upon request, all consents and exhibits filed therewith;

(c) To deliver promptly to the Representatives such number of the following documents as the Representatives shall reasonably request: (i) conformed copies of the Registration Statement as originally filed with the Commission and each amendment thereto (in each case excluding exhibits) and (ii) each Preliminary Prospectus, the Prospectus and any amended or supplemented Prospectus; and, if the delivery of a prospectus is required at any time after the Effective Time in connection with the offering or sale of the Stock or any other securities relating thereto and if at such time any events shall have occurred as a result of which the Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Prospectus is delivered, not misleading, or, if for any other reason it shall be necessary to amend or supplement the Prospectus in order to comply with the Securities Act, to notify the Representatives and, upon their request, to file such document and to prepare and furnish without charge to each Underwriter and to any dealer in securities as many copies as the Representatives may from time to time reasonably request of an amended or supplemented Prospectus which will correct such statement or omission or effect such compliance;

(d) To file promptly with the Commission any amendment to the Registration Statement or the Prospectus or any supplement to the Prospectus that may, in the judgment of the Company or counsel to the Representatives, be required by the Securities Act or requested by the Commission;

(e) Prior to filing with the Commission any amendment to the Registration Statement or supplement to the Prospectus or any Prospectus pursuant to Rule 424 of the Rules and Regulations, to furnish a copy thereof to the Representatives and counsel for the Underwriters and obtain the consent of the Representatives to the filing, which consent shall not be unreasonably withheld;

(f) As soon as practicable after the Effective Date, to make generally available to the Company's security holders and to deliver to the Representatives an earnings statement of the Company and its subsidiaries (which need not be audited) complying with Section 11(a) of the Securities Act and the Rules and Regulations (including, at the option of the Company, Rule 158);

(g) For a period of two years following the Effective Date, to furnish to the Representatives, upon request, copies of all materials furnished by the Company to its shareholders and all public reports and all reports and financial statements furnished by the Company to the principal national securities exchange upon which the Common Stock may be listed pursuant to requirements of or agreements with such exchange or to the Commission pursuant to the Exchange Act or any rule or regulation of the Commission thereunder;

(h) Promptly from time to time to take such action as the Representatives may reasonably request to qualify the Stock for offering and sale under the securities laws of such jurisdictions as the Representatives may request and to comply with such laws so as to permit the continuance of sales and dealings therein in such jurisdictions for as long as may be necessary to complete the distribution of the Stock; provided that in connection therewith the Company shall not be required to qualify as a foreign corporation or to file a general consent to service of process in any jurisdiction or to take any action that would subject it to general service of process in any jurisdiction where it is not presently so subject;

(i) For a period of 180 days from the date of the Prospectus, not to, directly or indirectly, (1) offer for sale, sell, pledge or otherwise dispose of (or enter into any transaction or device which is designed to, or could be expected to, result in the disposition by any person at any time in the future of) any shares of Common Stock or securities convertible into or exchangeable for Common Stock (other than (i) the Stock, (ii) shares issued pursuant to employee benefit plans, qualified stock option plans or other employee compensation plans described in the Prospectus or pursuant to currently outstanding options, warrants or rights and (iii) 575,000 shares of capital stock or options, warrants or right to acquire such number of shares of capital stock (subject to adjustments for stock splits, stock

dividends, combinations or other recapitalizations) issued in connection with acquisitions by the Company or any subsidiary), or sell or grant options, rights or warrants with respect to any shares of Common Stock or securities convertible into or exchangeable for Common Stock (other than the grant of options pursuant to option plans described in the Prospectus or as set forth in clause (iii) above), (2) enter into any swap or other derivatives transaction that transfers to another, in whole or in part, any of the economic benefits or risks of ownership of such shares of Common Stock, whether any such transaction described in clause (1) or (2) above is to be settled by delivery of Common Stock or other securities, in cash or otherwise, in each case without the prior written consent of ▇▇▇▇▇▇ Brothers Inc. on behalf of the Underwriters; and to use reasonable best efforts to cause each stockholder, officer and director of the Company listed on Exhibit A hereto to furnish to the Representatives, prior to the First Delivery Date, a letter or letters, substantially in the form of Exhibit B hereto;

(j) To apply for the inclusion of the Stock on the New York Stock Exchange, and to use its reasonable best efforts to effect that listing, subject only to official notice of issuance, prior to the First Delivery Date; and

(k) To apply the net proceeds from the sale of the Company Firm Stock as set forth in the Prospectus.

SECTION 7. Further Agreements of the Selling Stockholders. Each Selling Stockholder, severally and not jointly, agrees:

(a) That, subject to the terms and conditions hereunder, the Stock to be sold by the Selling Stockholder hereunder, which is represented by certificates held in custody for the Selling Stockholder is subject to the interest of the Underwriters and the other Selling Stockholders, that the arrangements made by the Selling Stockholder for such custody are to that extent irrevocable, and that the obligations of the Selling Stockholder hereunder shall not be terminated by any act of the Selling Stockholder, by operation of law, by the death or incapacity of any individual Selling Stockholder or, in the case of a trust, by the death or incapacity of any executor or trustee or the termination of such trust, or the occurrence of any other event.

(b) To deliver to the Representatives prior to the First Delivery Date a properly completed and executed applicable United States Treasury Department Form W-8 (if the Selling Stockholder is a non-United States person) or Form W-9 (if the Selling Stockholder is a United States person).

(c) To cooperate with the Company and the Underwriters and to execute and deliver, or use its reasonable best efforts to cause to be executed and delivered, all such other instruments, and take all such other actions as such party may reasonably be requested to take by the Company and the Underwriters from time to time, in order to effectuate the sale of the Stock by such Stockholder in the offering contemplated hereby.

SECTION 8. Expenses. The Company agrees to pay (a) the costs incident to the authorization, issuance, sale and delivery of the Stock and any stamp or transfer taxes payable in that connection; (b) the costs incident to the preparation, printing and filing under the Securities Act of the Registration Statement and any amendments and exhibits thereto; (c) the costs of distributing the Registration Statement as originally filed and each amendment thereto and any post-effective amendments thereof (including, in each case, exhibits), any Preliminary Prospectus, the Prospectus and any amendment or supplement to the Prospectus, all as provided in this Agreement; (d) the costs of producing and distributing this Agreement, any supplemental agreement among the Underwriters and any other related documents in connection with the offering, purchase, sale and delivery of the Stock; (e) the filing fees incident to securing the review by the NASD of the terms of sale of the Stock; (f) any applicable listing or other fees; (g) the fees and expenses of qualifying the Stock under the securities laws of the several jurisdictions as provided in Section 6(h) and of preparing, printing and distributing a Blue Sky Memorandum (including reasonable related fees and expenses of counsel to the

Underwriters); (h) the costs and expenses of the Company relating to investor presentations on any "road show" undertaken in connection with the marketing of the offering of the Stock, including, without limitation, expenses associated with the production of road show slides and graphics, fees and expenses of any consultants engaged in connection with the road show presentations with the prior approval of the Company, travel and lodging expenses of the representatives and officers of the Company and any such consultants, and the cost of any aircraft chartered in connection with the road show and (i) all other costs and expenses incident to the performance of the obligations of the Company under this Agreement; provided that, except as provided in this Section 8 and in Section 13 the Underwriters shall pay their own costs and expenses, including the costs and expenses of their counsel, any taxes on the Stock which they may sell and the expenses of advertising any offering of the Stock made by the Underwriters; and the Selling Stockholders shall pay the costs and expenses incurred by them related to their performance hereunder and all underwriting discounts, selling commissions and transfer taxes payable in connection with their respective sales of stock to the underwriters, unless any such Selling Stockholder shall have otherwise agreed with the Company.

SECTION 9. Conditions of Underwriters' Obligations. The respective obligations of the Underwriters hereunder are subject to the accuracy when made and on the applicable Delivery Date, of the representations and warranties of the Company and the Selling Stockholders contained herein, to the performance by the Company and the Selling Stockholders of their obligations hereunder to be performed on or prior to the applicable Delivery Date, and to each of the following additional terms and conditions:

(a) The Prospectus shall have been timely filed with the Commission in accordance with Section 6(a); no stop order suspending the effectiveness of the Registration Statement or any part thereof shall have been issued and no proceeding for that purpose shall have been initiated or to the Company's knowledge threatened by the Commission; and any request of the Commission for inclusion of additional information in the Registration Statement or the Prospectus or otherwise shall have been complied with in all material respects.

(b) All corporate proceedings and other legal matters incident to the authorization, form and validity of this Agreement, the Custody Agreements, the Stock, the Registration Statement and the Prospectus, and all other legal matters relating to this Agreement and the transactions contemplated hereby shall be reasonably satisfactory in all material respects to counsel for the Underwriters, and the Company and the Selling Stockholders shall have furnished to such counsel all documents and information that they may reasonably request to enable them to pass upon such matters.

(c) Skadden, Arps, Slate, ▇▇▇▇▇▇▇ & ▇▇▇▇ LLP shall have furnished to the Representatives their written opinion, as counsel to the Company, addressed to the Underwriters and dated such Delivery Date, in form and substance reasonably satisfactory to the Representatives, to the effect set forth on Exhibit C hereto.

(d) The Representatives shall have received from ▇▇▇▇▇▇ & ▇▇▇▇▇▇▇ LLP, counsel for the Underwriters, such opinion or opinions, dated such Delivery Date, with respect to the issuance and sale of the Stock, the Registration Statement, the Prospectus and other related matters as the Representatives may reasonably require, and the Company shall have furnished to such counsel such documents as they reasonably request for the purpose of enabling them to pass upon such matters.

(e) ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, Senior Counsel for the Company, shall have furnished to the Representatives a written opinion, addressed to the Underwriters and dated such Delivery Date, in form and substance reasonably satisfactory to the Representatives, to the effect set forth on Exhibit D hereto.

(f) The respective counsel for certain Selling Stockholders set forth on Schedule 2 hereto each shall have furnished to the Representatives their written opinion, as counsel to each of the Selling Stockholders for whom they are acting as counsel, addressed to the Underwriters in form and substance reasonably satisfactory to the Representatives dated such Delivery Date, to the effect set forth on Exhibit E hereto.

(g) At the time of execution of this Agreement, the Representatives shall have received from PricewaterhouseCoopers LLP a letter or letters, in form and substance satisfactory to the Representatives, addressed to the Underwriters and dated the date hereof (i) confirming that they are independent public accountants within the meaning of the Securities Act and are in compliance with the applicable requirements relating to the qualification of accountants under Rule 2-01 of Regulation S-X of the Commission and (ii) stating, as of the date hereof (or, with respect to matters involving changes or developments since the respective dates as of which specified financial information is given in the Prospectus, as of a date not more than five days prior to the date hereof), the conclusions and findings of such firm with respect to the financial information and other matters ordinarily covered by accountants' "comfort letters" to underwriters in connection with registered public offerings.

(h) With respect to the letter or letters of PricewaterhouseCoopers LLP referred to in the preceding paragraph and delivered to the Representatives concurrently with the execution of this Agreement (the "initial letters"), the Company shall have furnished to the Representatives a letter (the "bring-down letter") of such accountants, addressed to the Underwriters and dated such Delivery Date (i) confirming that they are independent public accountants within the meaning of the Securities Act and are in compliance with the applicable requirements relating to the qualification of accountants under Rule 2-01 of Regulation S-X of the Commission, (ii) stating, as of the date of the bring-down letter (or, with respect to matters involving changes or developments since the respective dates as of which specified financial information is given in the Prospectus, as of a date not more than five days prior to the date of the bring-down letter), the conclusions and findings of such firm with respect to the financial information and other matters covered by the initial letters and (iii) confirming in all material respects the conclusions and findings set forth in the initial letters.

(i) The Company shall have furnished to the Representatives a certificate, dated such Delivery Date, of its Chairman of the Board, its President or a Vice President and its chief financial officer stating that, to such officer's knowledge, the representations and warranties of the Company in Section 1 are true and correct as of such Delivery Date; the Company has complied with all its agreements contained herein that are required to be performed on or prior to the applicable Delivery Date; the conditions set forth in Section 9(a) (other than the first clause therein) have been fulfilled.

(j) Neither the Company nor any of its subsidiaries shall have sustained since the date of the latest audited financial statements included in the Prospectus (A) any loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, otherwise than as set forth or contemplated in the Prospectus or (B) since such date, there shall not have been any change in the capital stock or long-term debt of the Company or any of its subsidiaries or any change, or any development involving a prospective change, in or affecting the general affairs, management, financial position, stockholders' equity or results of operations of the Company and its subsidiaries otherwise than as set forth or contemplated in the Prospectus, the effect of which, in any such case described in clause (A) or (B), is, in the judgment of the Representatives, so material and adverse as to make it impracticable or inadvisable to proceed with the public offering or the delivery of the Stock being delivered on such Delivery Date on the terms and in the manner contemplated in the Prospectus.

(k) Subsequent to the execution and delivery of this Agreement there shall not have occurred any of the following: (i) trading in securities generally on the New York Stock Exchange or the American Stock Exchange or in the over-the-counter market, or trading in any securities of the Company on any exchange or in the over-the-counter market, shall have been suspended or materially limited or the settlement of such trading generally shall have been materially disrupted or minimum prices shall have been established on any such exchange or such market by the Commission, by such exchange or by any other regulatory body or governmental authority having jurisdiction, (ii) a banking moratorium shall have been declared by Federal or any state authority, (iii) the United States shall have become engaged

in hostilities, there shall have been an escalation in hostilities involving the United States or there shall have been a declaration of a national emergency or war by the United States or there shall have occurred any other calamity or crisis or (iv) there shall have occurred such a material adverse change in general economic, political or financial conditions, including, without limitation, as a result of terrorist activities after the date hereof (or the effect of international conditions arising after the date hereof on the financial markets in the United States shall be such) as to make it, in the judgment of the Representatives, impracticable or inadvisable to proceed with the public offering or delivery of the Stock being delivered on such Delivery Date on the terms and in the manner contemplated in the Prospectus.

(l) The New York Stock Exchange, Inc. shall have approved the Stock for listing, subject only to official notice of issuance.

(m) Each Selling Stockholder (or the Custodian or one or more attorneys-in-fact on behalf of such Selling Stockholder) shall have furnished to the Representatives on the relevant Delivery Date a certificate, dated such Delivery Date, signed by, or on behalf of, such Selling Stockholder stating that the representations, warranties and agreements of such Selling Stockholder contained herein are true and correct in all material respects as of such Delivery Date and that such Selling Stockholder has complied in all material respects with all agreements contained herein to be performed by such Selling Stockholder at or prior to such Delivery Date.

(n) All opinions, letters, evidence and certificates mentioned above or elsewhere in this Agreement shall be deemed to be in compliance with the provisions hereof only if they are in form and substance reasonably satisfactory to counsel for the Underwriters.

SECTION 10. Indemnification and Contribution.

(a) The Company shall indemnify and hold harmless each Underwriter, its directors, officers and employees and each person, if any, who controls any Underwriter within the meaning of the Securities Act, from and against any loss, claim, damage or liability, joint or several, or any action in respect thereof (including, but not limited to, any loss, claim, damage, liability or action relating to purchases and sales of Stock), to which that Underwriter, director, officer, employee or controlling person may become subject, under the Securities Act or otherwise, insofar as such loss, claim, damage, liability or action arises out of, or is based upon, (i) any untrue statement or alleged untrue statement of a material fact contained (A) in any Preliminary Prospectus, the Registration Statement or the Prospectus or in any amendment or supplement thereto or (B) in the slideshow presentation or any taped or written management presentation provided to investors by, or with the approval of, the Company in connection with the marketing of the offering of the Stock (the "Marketing Materials"), (ii) the omission or alleged omission to state in any Preliminary Prospectus, the Registration Statement or the Prospectus, or in any amendment or supplement thereto, or in any Marketing Materials, any material fact required to be stated therein or necessary to make the statements therein (with respect to the Preliminary Prospectus and the Prospectus, in light of the circumstances under which they were made) not misleading or (iii) any act or failure to act or any alleged act or failure to act by any Underwriter in connection with, or relating in any manner to, the Stock or the offering contemplated hereby, and which is included as part of or referred to in any loss, claim, damage, liability or action arising out of or based upon matters covered by clause (i) or (ii) above (provided that the Company shall not be liable under this clause (iii) to the extent that it is determined in a final judgment by a court of competent jurisdiction that such loss, claim, damage, liability or action resulted directly from any such acts or failures to act undertaken or omitted to be taken by such Underwriter through its gross negligence or willful misconduct), and shall reimburse each Underwriter and each such director, officer, employee or controlling person promptly upon demand for any reasonable legal or other expenses reasonably incurred by that Underwriter, director, officer, employee or controlling person in connection with investigating or defending or preparing to defend against any such loss, claim, damage, liability or

action as such expenses are incurred; provided, however, that the Company shall not be liable in any such case to the extent that any such loss, claim, damage, liability or action arises out of, or is based upon, any untrue statement or alleged untrue statement or omission or alleged omission made in any Preliminary Prospectus, the Registration Statement or the Prospectus, or in any such amendment or supplement, in reliance upon and in conformity with written information concerning such Underwriter furnished to the Company through the Representatives by or on behalf of any Underwriter specifically for inclusion therein which information consists solely of the information specified in Section 10(f); provided, that, with respect to any Preliminary Prospectus, the indemnity in this Section 10(a) shall not inure to the benefit of any Underwriter if (W) a loss, claim, liability, expense or damage results from an untrue statement of a material fact contained in, or the omission of a material fact from, such Preliminary Prospectus, which untrue statement or omission was corrected in the Prospectus (as amended or supplemented), (X) the Underwriters sold shares of Stock to the person alleging such loss, claim, liability, expense or damage without sending or giving, at or prior to the written confirmation of such sale, a copy of the Prospectus (as amended or supplemented) if required to have been delivered by law, (Y) the Company had previously furnished copies thereof to the Underwriters within a reasonable amount of time prior to such sale or such confirmation, and (Z) the Underwriters failed to deliver the corrected Prospectus. The foregoing indemnity agreement is in addition to any liability which the Company may otherwise have to any Underwriter or to any director, officer, employee or controlling person of that Underwriter.

(b) Each of the Selling Stockholders, severally and not jointly, in proportion to the number of shares of Stock to be sold by each of them hereunder, shall indemnify and hold harmless each Underwriter, its directors, officers and employees, and each person, if any, who controls any Underwriter within the meaning of the Securities Act, from and against any loss, claim, damage or liability, joint or several, or any action in respect thereof (including, but not limited to, any loss, claim, damage, liability or action relating to purchases and sales of the Stock), to which that Underwriter, director, officer, employee or controlling person may become subject, under the Securities Act or otherwise, insofar as such loss, claim, damage, liability or action arises out of, or is based upon, (i) any untrue statement or alleged untrue statement of a material fact contained in any Preliminary Prospectus, the Registration Statement or the Prospectus or in any amendment or supplement thereto or (ii) the omission or alleged omission to state in any Preliminary Prospectus, the Registration Statement or the Prospectus, or in any amendment or supplement thereto, any material fact required to be stated therein or necessary to make the statements therein (with respect to the Preliminary Prospectus and the Prospectus, in light of the circumstances under which they were made) not misleading, but in each case only to the extent that the untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with written information concerning such Selling Stockholder furnished to the Company by or on behalf of such Selling Stockholder specifically for inclusion therein and shall reimburse each Underwriter and any such director, officer or controlling person for any reasonable legal or other expenses reasonably incurred by such Underwriter or any such director, officer or controlling person in connection with investigating or defending or preparing to defend against any such loss, claim, damage, liability or action as such expenses are incurred; provided, however, that the Selling Stockholders shall not be liable in any such case to the extent that any such loss, claim, damage, liability or action arises out of, or is based upon, any untrue statement or alleged untrue statement or omission or alleged omission made in any Preliminary Prospectus, the Registration Statement or the Prospectus, or in any such amendment or supplement, in reliance upon and in conformity with written information concerning such Underwriter furnished to the Selling Stockholders through the Representatives by or on behalf of any Underwriter specifically for inclusion therein, which information consists solely of the information specified in Section 10(f); provided, that, with respect to any Preliminary Prospectus, the indemnity in this Section 10(a) shall not inure to the benefit of any Underwriter if (W) a loss, claim, liability, expense or damage results from an untrue statement of a material fact contained in, or the omission of a material

fact from, such Preliminary Prospectus, which untrue statement or omission was corrected in the Prospectus (as amended or supplemented), (X) the Underwriters sold shares of Stock to the person alleging such loss, claim, liability, expense or damage without sending or giving, at or prior to the written confirmation of such sale, a copy of the Prospectus (as amended or supplemented) if required to have been delivered by law, (Y) the Company had previously furnished copies thereof to the Underwriters within a reasonable amount of time prior to such sale or such confirmation, and (Z) the Underwriters failed to deliver the corrected Prospectus; and provided, further, that no Selling Stockholder's obligations hereunder shall exceed the net proceeds actually received by such Selling Stockholder from the sale of the Stock sold by such Selling Stockholder hereunder. The foregoing indemnity agreement is in addition to any liability that the Selling Stockholders may otherwise have to any Underwriter or to any director, officer, employee or controlling person of that Underwriter.

(c) Each Underwriter, severally and not jointly, shall indemnify and hold harmless the Company, each Selling Stockholder, each of their respective officers who have signed the Registration Statement, each of their respective directors, and each person, if any, who controls the Company or any Selling Stockholder within the meaning of the Securities Act, from and against any loss, claim, damage or liability, joint or several, or any action in respect thereof, to which the Company or any such director, officer, controlling person or Selling Stockholder may become subject, under the Securities Act or otherwise, insofar as such loss, claim, damage, liability or action arises out of, or is based upon, (i) any untrue statement or alleged untrue statement of a material fact contained in any Preliminary Prospectus, the Registration Statement or the Prospectus or in any amendment or supplement thereto, or (ii) the omission or alleged omission to state in any Preliminary Prospectus, the Registration Statement or the Prospectus, or in any amendment or supplement thereto, any material fact required to be stated therein or necessary to make the statements therein (with respect to the Preliminary Prospectus and the Prospectus, in light of the circumstances under which they were made) not misleading, but in each case only to the extent that the untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with written information concerning such Underwriter furnished to the Company through the Representatives by or on behalf of that Underwriter specifically for inclusion therein, which information is limited to the information set forth in Section 10(f), and shall reimburse the Company and any such director, officer, controlling person or Selling Stockholder for any legal or other expenses reasonably incurred by the Company or any such director, officer, controlling person or Selling Stockholder in connection with investigating or defending or preparing to defend against any such loss, claim, damage, liability or action as such expenses are incurred. The foregoing indemnity agreement is in addition to any liability which any Underwriter may otherwise have to the Company or any such director, officer, controlling person or Selling Stockholder.

(d) Promptly after receipt by an indemnified party under this Section 10 of notice of any claim or the commencement of any action, the indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under this Section 10, notify the indemnifying party in writing of the claim or the commencement of that action; provided, however, that the failure to notify the indemnifying party shall not relieve it from any liability which it may have under this Section 10 except to the extent it has been materially prejudiced by such failure and, provided further, that the failure to notify the indemnifying party shall not relieve it from any liability which it may have to an indemnified party otherwise than under this Section 10. If any such claim or action shall be brought against an indemnified party, and it shall notify the indemnifying party thereof, the indemnifying party shall be entitled to participate therein and, to the extent that it wishes, jointly with any other similarly notified indemnifying party, to assume the defense thereof with counsel reasonably satisfactory to the indemnified party. After notice from the indemnifying party to the indemnified party of its election to assume the defense of such claim or action, the indemnifying party shall not be liable to the indemnified party under this Section 10 for any legal or other expenses subsequently incurred by the indemnified party in connection with the defense thereof other than reasonable costs of investigation;

provided, however, that the Representatives shall have the right to employ counsel to represent jointly the Representatives and those other Underwriters and their respective directors, officers, employees and controlling persons who may be subject to liability arising out of any claim in respect of which indemnity may be sought by the Underwriters against the Company under this Section 10 if, in the opinion of counsel to the Representatives, it is advisable for the Representatives and those Underwriters, directors, officers, employees and controlling persons to be jointly represented by separate counsel, and in that event the fees and expenses of such separate counsel shall be paid by the Company. No indemnifying party shall (i) without the prior written consent of the indemnified parties (which consent shall not be unreasonably withheld), settle or compromise or consent to the entry of any judgment with respect to any pending or threatened claim, action, suit or proceeding in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified parties are actual or potential parties to such claim or action) unless such settlement, compromise or consent includes an unconditional release of each indemnified party from all liability arising out of such claim, action, suit or proceeding, or (ii) be liable for any settlement of any such action effected without its written consent (which consent shall not be unreasonably withheld), but if settled with the consent of the indemnifying party or if there be a final judgment of the plaintiff in any such action, the indemnifying party agrees to indemnify and hold harmless any indemnified party from and against any loss or liability by reason of such settlement or judgment.

(e) If the indemnification provided for in this Section 10 shall for any reason be unavailable to or insufficient to hold harmless an indemnified party under Section 10(a) or 10(b) or 10(c) in respect of any loss, claim, damage or liability, or any action in respect thereof or referred to therein, then each indemnifying party shall, in lieu of indemnifying such indemnified party, contribute to the amount paid or payable by such indemnified party as a result of such loss, claim, damage or liability, or action in respect thereof, (i) in such proportion as shall be appropriate to reflect the relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other from the offering of the Stock or (ii) if the allocation provided by clause (i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Company and the Selling Stockholders on the one hand and the Underwriters on the other with respect to the statements or omissions which resulted in such loss, claim, damage or liability, or action in respect thereof, as well as any other relevant equitable considerations. The relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other with respect to such offering shall be deemed to be in the same proportion as the total net proceeds from the offering of the Stock purchased under this Agreement (before deducting expenses) received by the Company and the Selling Stockholders on the one hand and the total underwriting discounts and commissions received by the Underwriters with respect to the shares of the Stock purchased under this Agreement on the other hand, bear to the total gross proceeds from the offering of the shares of the Stock under this Agreement, in each case as set forth in the table on the cover page of the Prospectus. The relative fault shall be determined by reference to whether the untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact relates to information supplied by the Company, the Selling Stockholders or the Underwriters, the intent of the parties and their relative knowledge, access to information and opportunity to correct or prevent such statement or omission. The Company and the Underwriters agree that it would not be just and equitable if contributions pursuant to this Section 10 were to be determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take into account the equitable considerations referred to herein. The amount paid or payable by an indemnified party as a result of the loss, claim, damage or liability, or action in respect thereof, referred to above in this Section 10 shall be deemed to include, for purposes of this Section 10(e), any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 10(e), no Underwriter shall be required to

contribute any amount in excess of the amount by which the total price at which the shares of Stock underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise paid or become liable to pay by reason of any untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters' obligations to contribute as provided in this Section 10(e) are several in proportion to their respective underwriting obligations and not joint.

(f) The Underwriters severally confirm and the Company and the Selling Stockholders acknowledge that the statements with respect to the public offering of the Stock by the Underwriters set forth on the cover page of the Prospectus, the legend concerning over-allotments on the inside front cover page of the Prospectus, and the following information under the caption "Underwriting" in the Prospectus (i) concession and reallowance figures, (ii) the information in the table in the first paragraph, (iii) the information under the subheading "Stabilization, Short Positions and Penalty Bids", (iv) the information under the subheading "Discretionary Sales", and (v) the information under the subheading "Electronic Distribution" constitute the only information concerning such Underwriters furnished in writing to the Company and the Selling Stockholders by or on behalf of the Underwriters specifically for inclusion in the Registration Statement and the Prospectus.

SECTION 11. Defaulting Underwriters.

If, on any Delivery Date, any Underwriter defaults in the performance of its obligations under this Agreement, the remaining non-defaulting Underwriters shall be obligated to purchase the Stock which the defaulting Underwriter agreed but failed to purchase on such Delivery Date in the respective proportions which the number of shares of the Firm Stock set opposite the name of each remaining non-defaulting Underwriter in Schedule 1 hereto bears to the total number of shares of the Firm Stock set opposite the names of all the remaining non-defaulting Underwriters in Schedule 1 hereto; provided, however, that the remaining non-defaulting Underwriters shall not be obligated to purchase any of the Stock on such Delivery Date if the total number of shares of the Stock which the defaulting Underwriter or Underwriters agreed but failed to purchase on such date exceeds 9.09% of the total number of shares of the Stock to be purchased on such Delivery Date, and any remaining non-defaulting Underwriter shall not be obligated to purchase more than 110% of the number of shares of the Stock which it agreed to purchase on such Delivery Date pursuant to the terms of Section 3. If the foregoing maximums are exceeded, the remaining non-defaulting Underwriters, or those other underwriters satisfactory to the Representatives who so agree, shall have the right, but shall not be obligated, to purchase, in such proportion as may be agreed upon among them, all the Stock to be purchased on such Delivery Date. If the remaining Underwriters or other underwriters satisfactory to the Representatives do not elect to purchase the shares which the defaulting Underwriter or Underwriters agreed but failed to purchase on such Delivery Date, this Agreement (or, with respect to a Second Delivery Date, the obligation of the Underwriters to purchase, and of the Selling Stockholders to sell, the Option Stock) shall terminate without liability on the part of any non-defaulting Underwriter, any Selling Stockholder or the Company, except that the Company and the Selling Stockholders will continue to be liable for the payment of expenses to the extent set forth in Sections 8 and 13. As used in this Agreement, the term "Underwriter" includes, for all purposes of this Agreement unless the context requires otherwise, any party not listed in Schedule 1 hereto who, pursuant to this Section 11, purchases Stock which a defaulting Underwriter agreed but failed to purchase.

Nothing contained herein shall relieve a defaulting Underwriter of any liability it may have to the Company or the Selling Stockholders for damages caused by its default. If other Underwriters are obligated or agree to purchase the Stock of a defaulting or withdrawing Underwriter, either the Representatives or the Company may postpone the Delivery Date for up to seven full business days in

order to effect any changes that in the opinion of counsel for the Company or counsel for the Underwriters may be necessary in the Registration Statement, the Prospectus or in any other document or arrangement.

SECTION 12. Termination. The obligations of the Underwriters hereunder may be terminated by the Representatives by notice given to and received by the Company and each Selling Stockholder prior to delivery of and payment for the Firm Stock if, prior to that time, any of the events described in Sections 9(i) or 9(j), shall have occurred or if the Underwriters shall decline to purchase the Stock for any reason permitted under this Agreement.

SECTION 13. Reimbursement of Underwriters' Expenses. If the Company or any Selling Stockholder shall fail to tender the Stock for delivery to the Underwriters by reason of any failure, refusal or inability on the part of the Company or any Selling Stockholder to perform any agreement on its part to be performed, or because any other condition of the Underwriters' obligations hereunder required to be fulfilled by the Company or the Selling Stockholders is not fulfilled, the Company will reimburse the Underwriters for all reasonable out-of-pocket expenses (including fees and disbursements of counsel) incurred by the Underwriters in connection with this Agreement and the proposed purchase of the Stock, and upon demand the Company shall pay the full amount thereof to the Representatives. If this Agreement is terminated pursuant to Section 11 by reason of the default of one or more Underwriters, the Company shall not be obligated to reimburse any defaulting Underwriter on account of those expenses.

SECTION 14. Notices, Etc. All statements, requests, notices and agreements hereunder shall be in writing, and:

(a) if to the Underwriters, shall be delivered or sent by mail, telex or facsimile transmission to ▇▇▇▇▇▇ Brothers Inc., ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇.▇. ▇▇▇▇▇, Attention: Syndicate Registration Department, Fax (▇▇▇) ▇▇▇-▇▇▇▇, with a copy, in the case of any notice pursuant to Section 10(c), to the Director of Litigation, Office of the General Counsel, ▇▇▇▇▇▇ Brothers Inc., ▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇;

(b) if to the Company, shall be delivered or sent by mail, telex or facsimile transmission to the address of the Company set forth in the Registration Statement, Attention: ▇▇▇▇▇ ▇▇▇▇▇▇ (Fax: (▇▇▇) ▇▇▇-▇▇▇▇), with a copy to the Company at such address, Attention: General Counsel;

(c) if to any Selling Stockholder, shall be delivered or sent by mail, telex or facsimile transmission to such Selling Stockholder at the address set forth on Schedule 2 hereto, with a copy to the counsel, if any, to such Selling Stockholder listed on such schedule.

(d) Any such statements, requests, notices or agreements shall take effect at the time of receipt thereof. The Company shall be entitled to act and rely upon any request, consent, notice or agreement given or made on behalf of the Underwriters by ▇▇▇▇▇▇ Brothers Inc. on behalf of the Representatives.

SECTION 15. Persons Entitled to Benefit of Agreement. This Agreement shall inure to the benefit of and be binding upon the Underwriters, the Company, the Selling Stockholders and their respective successors. This Agreement and the terms and provisions hereof are for the sole benefit of only those persons, except that (A) the representations, warranties, indemnities and agreements of the Company contained in this Agreement shall also be deemed to be for the benefit of the directors, officers and the person or persons, if any, who control any Underwriter within the meaning of Section 15 of the Securities Act and (B) the indemnity agreement of the Underwriters contained in Section 10(c) of this Agreement shall be deemed to be for the benefit of (i) directors of the Company, officers of the Company who have signed the Registration Statement and any person controlling the Company within the meaning of Section 15 of the Securities Act and (ii) directors of any Selling Stockholder and any person controlling such Selling Stockholder within the meaning of Section 15 of the Securities Act.

Nothing in this Agreement is intended or shall be construed to give any person, other than the persons referred to in this Section 15, any legal or equitable right, remedy or claim under or in respect of this Agreement or any provision contained herein.

SECTION 16. Survival. The respective indemnities, representations, warranties and agreements of the Company, the Selling Stockholders and the Underwriters contained in this Agreement or made by or on behalf on them, respectively, pursuant to this Agreement, shall survive the delivery of and payment for the Stock and shall remain in full force and effect, regardless of any investigation made by or on behalf of any of them or any person controlling any of them.

SECTION 17. Definition of the Terms "Business Day" and "Subsidiary." For purposes of this Agreement, (a) "business day" means each Monday, Tuesday, Wednesday, Thursday or Friday which is not a day on which banking institutions in The City of New York are generally authorized or obligated by law or executive order to close and (b) "subsidiary" has the meaning set forth in Rule 405 of the Rules and Regulations; provided, that, "subsidiary" shall not include OSP Consultants, Inc., OSP Telecom, Inc., Utility Locate and Mapping Services, Inc., RJE Telecom, Inc., International Communications Services, Inc., OSP, Inc., or OSP Telecom De Mexico S.A. D.E., C.V.

SECTION 18. Governing Law. This Agreement shall be governed by and construed in accordance with the laws of New York.

SECTION 19. Counterparts. This Agreement may be executed in one or more counterparts and, if executed in more than one counterpart, the executed counterparts shall each be deemed to be an original but all such counterparts shall together constitute one and the same instrument.

SECTION 20. Headings. The headings herein are inserted for convenience of reference only and are not intended to be part of, or to affect the meaning or interpretation of, this Agreement.

If the foregoing correctly sets forth the agreement between the Company, the Selling Stockholders and the Underwriters, please indicate your acceptance in the space provided for that purpose below.

		Very truly yours,
		INFRASOURCE SERVICES, INC.
		By	Name: Title:
		THE SELLING STOCKHOLDERS SET FORTH IN SCHEDULE 2 HERETO
		By	Name: Title: Attorney-in-Fact
Accepted:
▇▇▇▇▇▇ BROTHERS INC. ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇
For themselves and as Representatives of the several Underwriters named in Schedule 1 hereto
By	▇▇▇▇▇▇ BROTHERS INC.
By
Authorized Representative

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14,705,884 Shares INFRASOURCE SERVICES, INC. Common Stock UNDERWRITING AGREEMENT

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