Document:

Stockholders Agreement

 Exhibit 10.10 
 STOCKHOLDERS AGREEMENT 
 OF 
 INFRASTRUX GROUP, INC. 
 This Stockholders Agreement
(“Agreement”) is entered into as of this 12th day of December, 2007, by and among InfrastruX Group, Inc., a Washington corporation (the “Company”), InfrastruX Holdings, LLC, a Delaware limited liability company
(together with any Affiliate transferee(s) of such company, the “Tenaska Stockholder”), and the Persons listed on the signature pages attached hereto (each individually, a “Management Stockholder,” and collectively,
the “Management Stockholders”). These parties are sometimes referred to herein individually by name or as a “Party” and collectively as the “Parties.” The Tenaska Stockholder, together with
(i) any Affiliate (as defined below) of the Tenaska Stockholder to which any Tenaska Stockholder may hereafter sell, assign, transfer, convey, pledge or otherwise dispose of (collectively, “Transfer”) any equity securities of
the Company (the “Equity Securities”), including any shares of Common Stock of the Company, par value $0.01 per share (the “Common Stock”) and (ii) any Affiliates (as defined below) of the Tenaska Stockholder
to which the Company may hereafter issue Equity Securities are sometimes collectively referred to herein as the “Tenaska Stockholders.” For purposes of this Agreement, “Affiliate” shall mean, with respect to any
individual, partnership, corporation, limited liability company, business trust, joint stock company, trust, unincorporated association, joint venture, governmental authority or other entity of whatever nature (each, a “Person”),
any other Person directly or indirectly controlling, controlled by, or under common control with, such Person where “control” shall have the meaning given such term under Rule 405 of the Securities Act of 1933, as amended (the
“Act”). 
 RECITALS: 
 WHEREAS, each of the Management Stockholders is an employee, executive officer or director of or consultant to the Company or one or more subsidiaries of the Company; 
 WHEREAS, the Company may hereafter issue to each Management Stockholder shares of Common Stock as a result of the settlement of stock appreciation
rights (“SARs”) and restricted stock units (“RSUs”) granted pursuant to the InfrastruX Group, Inc. 2007 Equity Incentive Plan (the “Equity Plan”) or any other employee benefit plan or stock purchase
plan hereafter adopted by the board of directors of the Company (the “Board of Directors”) (each, a “Purchase Plan”); 
 WHEREAS, the Company may sell and a Management Stockholder may purchase shares of Common Stock not under any Purchase Plan or the Equity Plan (the “Purchased Shares”); and 
 WHEREAS, the Company, the Tenaska Stockholder and the Management Stockholders desire to enter into this Agreement to provide for certain matters with
respect to the ownership and transfer by the Management Stockholders of the shares of Common Stock acquired upon settlement of SARs and RSUs (“Equity Plan Shares”), Purchased Shares and any 

  

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other shares now or hereafter issued or sold to any Management Stockholders (collectively, the “Restricted Securities”). 
 AGREEMENT: 
 NOW, THEREFORE,
in consideration of the foregoing and the mutual agreements set forth herein, and other good and valuable consideration, the receipt and adequacy of which is hereby acknowledged, the Parties hereto, intending to be legally bound, hereby agree as
follows: 
 Section 1.    Restrictions on Transfers. 
 (a)    Except as otherwise expressly permitted by Section 1(b) or otherwise under this Agreement, the Management Stockholders
shall not Transfer any Restricted Securities. Any purported Transfer in violation of the provisions of this Section 1 shall be null and void and shall have no force or effect. 
 (b)    Nothing in Section 1(a) shall prevent the Transfer of any Restricted Securities by any Management Stockholder to
(i) the Company, the Tenaska Stockholder or any Affiliate of either; (ii) such Management Stockholder’s spouse, children or trusts for their benefit provided the Management Stockholder retains the sole and exclusive right to vote and
dispose of any Restricted Securities transferred to the family member or trust; and (iii) upon a Management Stockholder’s death, the Management Stockholder’s executors, administrators, testamentary trustees, legatees and
beneficiaries. 
 (c)    Each Management Stockholder agrees that, as a condition precedent to any transfer described in
Section 1(b), each transferee described in Section 1(b) (other than the Company, the Tenaska Stockholders or any Affiliate of any of them) shall deliver to the Company a copy of this Agreement signed by such transferee together with such
other documentation as may be reasonably requested by the Company. 
 Section 2.    Rights to Repurchase
Shares. 
 (a)    For a period of nine (9) months following the later of (i) the Termination of
Directorship (as defined below) of any Management Stockholder who is a Director, the Termination of Consultancy (as defined below) of any Management Stockholder who is a consultant to the Company or its Subsidiaries (as defined below) or the
Termination of Employment (as defined below) of any Management Stockholder who is an employee of the Company or its Subsidiaries (as defined below), (ii) the exercise, in accordance with the terms of the Equity Plan or the applicable SAR
agreement issued thereunder, of all vested SARs (the “Vested SARs”) held by such Management Stockholder as of the time of such Management Stockholder’s Termination of Employment, Termination of Consultancy or Termination of
Directorship, or (iii) the payment, in accordance with the terms of the Equity Plan or the applicable RSU agreement issued thereunder, of any vested RSUs (the “Vested RSUs,” and together with Vested SARS, the “Vested
Awards”) held by such Management Stockholder as of the time of such Management Stockholder’s Termination of Employment, Termination of Consultancy or Termination of Directorship, the Company may elect, but shall not be required 

  

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(other than in the event of death as described below), to repurchase or to designate one or more Persons to purchase Restricted Securities held by such
Management Stockholder or his or her successor in interest thereunder (“Call Right”). If the Termination of Employment, Termination of Consultancy or Termination of Directorship is by reason of death, the Management Stockholder by
written notice to the Company given by the Management Stockholder’s executor or beneficiary in accordance with Section 8(g) of this Agreement not less than five (5) days prior to the last date on which the Call Right may be exercised
by the Company, may cause at his/her election the Company to exercise its Call Right, and such exercise shall be mandatory and not discretionary. The Call Right shall be exercised by written notice (“Call Notice”) to the Management
Stockholder given in accordance with Section 8(g) of this Agreement on or prior to the last date on which the Call Right may be exercised by the Company. Notwithstanding the foregoing, there shall be no right to repurchase a Management
Stockholder’s Restricted Securities if there occurs a Termination of Directorship but such holder continues to be employed by the Company or one of its Subsidiaries. For purposes of this Agreement, “Subsidiary” means any
“subsidiary corporation” as defined in Section 424(f) of the Code and any applicable regulations promulgated thereunder. 
 (b)    The repurchase price for Restricted Securities payable by the Company or its designee upon exercise of the Call Right (collectively referred to as the “Repurchase Price”) shall be as follows:

 (i)    in the event of any Termination of Employment, Termination of Consultancy or Termination of Directorship by
the Company or any of its Subsidiaries, as applicable, other than (A) for Cause (as defined below), or (B) by reason of the Management Stockholder’s resignation without Good Reason (as defined below), the Fair Market Value (as such
term is defined in Section 2(f) below) of the Restricted Securities subject to the Call Right on the date of the Call Notice; 
 (ii)    in the event of any Termination of Employment, Termination of Consultancy or Termination of Directorship by the Company or any of its Subsidiaries, as applicable, for Cause, the lesser of (A) the Fair Market
Value (as such term is defined in Section 2(f) below) of the Restricted Securities subject to the Call Right on the date of the Call Notice and (B) with respect to Purchased Shares, the aggregate price paid for any Purchased Shares by the
Management Stockholder or, with respect to Equity Plan Shares, the Fair Market Value (as such term is defined in Section 2(f) below) of the Equity Plan Shares on the date such shares were delivered in settlement of the SAR or RSU applicable
thereto; and 
 (iii)    in the event of any Termination of Employment, Termination of Consultancy or Termination of
Directorship by the Company or any of its Subsidiaries, as applicable, by reason of resignation without Good Reason, ninety-five percent (95%) of the Fair Market Value (as such term is defined in Section 2(f) below) of the Restricted
Securities subject to the Call Right on the date of the Call Notice. 
 (c)    For purposes of this Agreement,
“Termination of Employment” shall mean the time when the employee-employer relationship between a Management Stockholder and the 

  

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Company, InfrastruX Holdings, LLC (“Parent”), a Subsidiary or a Joint Venture in which the Company or Parent controls the management
(“Joint Venture”) is terminated for any reason, with or without Cause, including, but not by way of limitation, a termination by resignation, discharge, death, Disability or retirement, but excluding a termination where there is a
simultaneous reemployment by the Company, Parent, a Subsidiary or a Joint Venture as an employee or consultant. For purposes of this Agreement, “Termination of Consultancy” shall mean the time when the engagement of a Management
Stockholder as a consultant to the Company, Parent, any Subsidiary or Joint Venture is terminated for any reason, with or without Cause, including, but not by way of limitation, by resignation, discharge, death, Disability or retirement, but
excluding terminations where there is simultaneous reemployment by the Company or one of its Subsidiaries as an employee or consultant. For purposes of this Agreement, “Termination of Directorship” shall mean the time when a
Management Stockholder ceases to be a member of the Board of Directors of the Company or one of its Subsidiaries (“Director”) for any reason, including, but not by way of limitation, a termination by resignation, failure to be
elected, death or retirement, but excluding terminations where there is simultaneous employment by the Company or one of its Subsidiaries as an employee or consultant. “Cause” shall mean the Management Stockholder’s
(i) willful misconduct, (ii) willfully engaging in conduct which could reasonably result in a conviction of a felony or a crime against the Company or conduct involving substance abuse, fraud or moral turpitude, or which would materially
compromise the Company’s reputation or the Management Stockholder’s ability to perform his or her duties, as determined by the Company, or (iii) unreasonable refusal to perform his or her duties and responsibilities in any material
respect, after receipt of written notice specifying in reasonable detail the duties and responsibilities not being performed. Cause as defined above shall be determined in good faith by the Board of Directors or Compensation Committee in its sole
and exclusive discretion. Notwithstanding the foregoing, if a Management Stockholder is a party to an employment agreement with the Company or any of its affiliates (or other agreement with the Company or any affiliate defining “cause” for
this purpose), then “Cause” shall have the meaning defined in the applicable agreement of the Management Stockholder. “Disability” shall have the meaning given such term in Section 22(e) of the Internal Revenue
Code of 1986, as amended, or, if the Management Stockholder is a party to a written employment agreement with the Company or any of its Subsidiaries, then as such term is defined in the applicable agreement of the Management Stockholder.
“Good Reason” shall mean, resignation or other voluntary termination of employment by a Management Stockholder (i) within the two week period immediately following a permanent material reduction of the Management
Stockholder’s duties and responsibilities or a permanent change in the Management Stockholder’s duties and responsibilities such that the Management Stockholder’s duties and responsibilities are materially inconsistent with the type
of duties and responsibilities of the Management Stockholder in effect immediately prior to such reduction or change, (ii) following a material reduction in the Management Stockholder’s compensation or employee benefits if such reduction
results in the Management Stockholder receiving compensation and benefits which are, in the aggregate, materially less than the compensation and benefits then currently received by the Management Stockholder (other than reductions of compensation or
benefits applicable to management employees of the Company in general), or (iii) in connection with a relocation by the Company without Management Stockholder’s consent of Management Stockholder’s principal location of employment by
more than fifty (50) miles, or if the 
  

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Management Stockholder is a party to a written employment agreement with the Company or any of its Subsidiaries, then as such term is defined in the
applicable agreement of such Management Stockholder. The committee appointed to administer the Equity Plan (the “Compensation Committee”) or the Board of Directors shall determine the effect of all matters and questions relating to
Termination of Employment, Termination of Consultancy or Termination of Directorship. 
 (d)    The repurchase of
Restricted Securities pursuant to the exercise of a Call Right shall take place on the later of (i) the date specified by the Company which shall in no event be later than sixty (60) days following the date of the Call Notice and
(ii) the date falling not more than ten (10) days following the receipt by the Company of all necessary governmental approvals relating thereto. On such date, the Management Stockholder shall transfer the Restricted Securities subject to
the Call Notice to the Company or its designee, free and clear of all liens and encumbrances (other than those applied to the Company or its affiliates), by delivering to the Company the certificates representing the Restricted Securities to be
purchased, duly endorsed for transfer to the Company or its designee or accompanied by a stock power duly executed in blank, and the Company or its designee shall pay to the Management Stockholder the Repurchase Price. The Company and the Management
Stockholder each shall use his, her or its reasonable efforts to expedite all proceedings contemplated hereunder to obtain a determination of the Repurchase Price of the Restricted Securities at the earliest practicable date. 
 (e)    (i)    In the case of any transfer of title or beneficial ownership of Restricted Securities upon default,
foreclosure, forfeit, divorce, court order or otherwise, other than by a voluntary decision on the part of a Management Stockholder including a transfer under a testamentary instrument (each, an “Involuntary Transfer”), the
Management Stockholder shall promptly (but in no event later than two (2) business days after the Involuntary Transfer) furnish written notice (the “Involuntary Transfer Notice”) to the Company indicating that the Involuntary
Transfer has occurred, specifying the name of the Person to whom the shares were transferred (the “Involuntary Transferee”), giving a detailed description of the circumstances giving rise to, and stating the legal basis for, the
Involuntary Transfer. 
 (ii)    Upon the receipt of the Involuntary Transfer Notice, and for sixty (60) days
thereafter, the Company shall have the right to elect to repurchase or to cause its designee to purchase, and the Involuntary Transferee shall have the obligation to sell, all (but not less than all) of the Restricted Securities acquired by the
Involuntary Transferee for a repurchase price equal to the Fair Market Value of such Restricted Securities as of the date of the Involuntary Transfer (the “Involuntary Transfer Repurchase Price” and such right, the
“Involuntary Transfer Repurchase Right”). The Involuntary Transfer Repurchase Right shall be exercised by written notice (the “Involuntary Transfer Repurchase Notice”) to the Involuntary Transferee given in
accordance with Section 8(g) of this Agreement on or prior to the last date on which the Involuntary Transfer Repurchase Right may be exercised by the Company. 
 (iii)    The repurchase of Restricted Securities pursuant to the exercise of the Involuntary Transfer Repurchase Right shall take place on the later of (i) the date 

  

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specified by the Company which shall in no event be later than sixty (60) days following the date of the Involuntary Transfer Repurchase Notice, and
(ii) within ten (10) days following the receipt by the Company of all necessary governmental approvals. On such date, the Involuntary Transferee shall transfer the Restricted Securities subject to the Involuntary Transfer Repurchase Notice
to the Company or its designee, free and clear of all liens and encumbrances, by delivering to the Company the certificates representing the Restricted Securities to be purchased, duly endorsed for transfer to the Company or its designee or
accompanied by a stock power duly executed in blank, and the Company or its designee shall pay to the Involuntary Transferee the Involuntary Transfer Repurchase Price. The Company and the Involuntary Transferee each shall use his, her or its
reasonable efforts to expedite all proceedings contemplated hereunder to obtain a determination of the Involuntary Transfer Repurchase Price of the Restricted Securities at the earliest practicable date. 
 (f)    The Fair Market Value of the Restricted Securities shall be determined by the Board of Directors as follows: 
 (i)    if the Common Stock is listed on one or more National Securities Exchanges (within the meaning of the Securities Exchange Act
of 1934, as amended), each Restricted Security to be repurchased shall be valued at the average closing price of a share of Common Stock on the principal exchange on which shares of Common Stock are then trading, on the twenty (20) trading days
immediately preceding such date; 
 (ii)    if the Common Stock is not traded on a National Securities Exchange but is
quoted on the NASDAQ Stock Market or a successor quotation system and the Common Stock is listed as a National Market Issue under the NASD National Market System, each Restricted Security to be repurchased shall be valued at the average of the last
sales price on each of the twenty (20) trading days immediately preceding such date as reported by the NASDAQ Stock Market or such successor quotation system; or 
 (iii)    if the Common Stock is not publicly traded on a National Securities Exchange and is not quoted on the NASDAQ Stock Market or a successor quotation system, the Fair Market Value of the
Restricted Securities to be repurchased shall be determined in good faith by the Compensation Committee or the Board of Directors without applying discounts for lack of marketability and minority holdings. 
 Section 3.    Bring-Along Rights. 
 (a) If any Tenaska Stockholder at any time, or from time to time, proposes to Transfer shares of Common Stock and/or shares of preferred stock convertible into Common Stock in one, or a series of related, arm’s
length transactions to Persons who are bona fide third party purchasers (each, a “Third Party Purchaser”) that is not an Affiliate of the Tenaska Stockholder, then the Tenaska Stockholder(s) shall have the right (a
“Bring-Along Right”), but not the obligation, to require each Management Stockholder to tender for purchase to the Third Party Purchaser, on the same terms and conditions as apply to the selling Tenaska Stockholder(s), a number of
Restricted Securities (and any Equity Plan Shares that would 

  

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otherwise be deliverable in connection with Vested Awards in such transaction) that, in the aggregate, equal the number derived by multiplying (1) the
total number of Restricted Securities owned by the Management Stockholder (including Equity Plan Shares issuable in respect of all Vested Awards by the Management Stockholder whether or not exercised and including any SARs and RSUs that vest as a
result of the consummation of the Transfer to the Third Party Purchaser); by (2) a fraction, the numerator of which is the total number of shares of Common Stock to be sold by the Tenaska Stockholder(s) in connection with the transaction or
series of related transactions and the denominator of which is the total number of the then outstanding shares of Common Stock (including all shares of preferred stock, measured on an as-if converted basis) held by all Tenaska Stockholder(s).

 (b)    If any Tenaska Stockholder elects to exercise its Bring-Along Right under this Section 3 with respect to
the Restricted Securities held by the Management Stockholders, such Tenaska Stockholder(s) shall notify each Management Stockholder in writing of such election (collectively, the “Bring-Along Notices”). Each Bring-Along Notice shall
set forth: (i) the name of the Third Party Purchaser(s) and the number of shares of Common Stock and/or shares of preferred stock convertible into Common Stock proposed to be sold by the Tenaska Stockholder to the Third Party Purchaser(s);
(ii) the proposed amount and form of consideration and terms and conditions of payment offered by the Third Party Purchaser(s) and a summary of any other material terms pertaining to the Transfer (“Third Party Terms”) and
(iii) the number of Restricted Securities and Equity Plan Shares pursuant to Vested Awards otherwise deliverable upon the transaction that the Management Stockholder shall sell in the Transfer. The Bring-Along Notices shall be given at least
seven (7) business days before the closing of the proposed Transfer. 
 (c)    Upon the giving of a Bring-Along
Notice, each Management Stockholder shall be obligated to sell the number of Restricted Securities set forth in each Management Stockholder’s Bring-Along Notice on the Third Party Terms. 
 (d)    At the closing of the Transfer to any Third Party Purchaser(s) pursuant to this Section 3, the Third Party Purchaser(s)
shall remit to the Management Stockholder the consideration for the Restricted Securities held by the Management Stockholder sold pursuant hereto minus any consideration to be escrowed or otherwise held back in accordance with the Third Party
Terms, and minus the aggregate exercise price of any Vested Awards being Transferred by the Management Stockholder to the Third Party Purchaser(s), against delivery by the Management Stockholder of certificates for Restricted Securities, duly
endorsed for Transfer or with duly executed stock powers and an instrument evidencing the transfer or the cancellation of the Vested Awards subject to the Bring-Along Right (in each case, in a form reasonably acceptable to the Company and the
Tenaska Stockholder), and the compliance by the Management Stockholder with any other conditions to closing generally applicable to the Tenaska Stockholder(s) and all other holders of Common Stock (and/or shares of preferred stock convertible into
Common Stock) selling shares in the transaction. The foregoing notwithstanding in connection with any Transfer, a Management Stockholder shall not be required to make any representations or warranties other than reasonable and customary
representations or warranties (i) regarding his or her ownership of and title to his or her Restricted Securities, and (ii) typically made by Management and offers in similar transactions. 
  

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 Section 4.    Tag-Along Rights. 
 (a)    In the event that, the Tenaska Stockholders propose to Transfer shares of Common Stock (or shares of preferred stock
convertible into Common Stock) to a Third Party Purchaser (a “Tag-Along Transfer”), then each Management Stockholder shall have the right (the “Tag-Along Right”) to require that the proposed Third Party Purchaser
purchase from such Management Stockholder up to the number of whole Restricted Securities (including any Restricted Securities issuable upon the exercise of Vested Awards or any RSUs or SARs that vest as a result of the consummation of the Transfer
to the Third Party Purchaser) equal to the number derived by multiplying (x) the total number of shares of Common Stock (and/or shares of preferred stock convertible into Common Stock, measured on an as-if converted basis) that the proposed
Third Party Purchaser has agreed or committed to purchase, by (y) a fraction, the numerator of which is the total number of Restricted Securities (including any Restricted Securities issuable upon exercise of Vested Awards (including
SARs and RSUs that vest as a result of the consummation of the Transfer to the Third Party Purchaser)) owned by the Management Stockholder, and the denominator of which is the aggregate number of shares of Common Stock and preferred stock
convertible into Common Stock (measured on an as-if converted basis) owned by all Tenaska Stockholders, the Management Stockholder and all other holders of Common Stock and/or preferred stock convertible into Common Stock that have exercised a
Tag-Along Right similar to the rights granted to the Management Stockholder in this Section 4 (including any Restricted Securities issuable upon exercise of all Vested Awards (including RSUs and SARs that vest as a result of the consummation of
the Transfer to the Third Party Purchaser)). The intent of this computation is to accord to the Management Stockholder the right to sell the same percentage of its holdings of Common Stock as the Tenaska Stockholders are entitled to sell in such a
transaction (including shares of preferred stock convertible into Common Stock, measured on an as-if converted basis). Any Restricted Securities purchased from the Management Stockholder pursuant to this Section 4(a) shall be purchased upon the
same terms and conditions as such proposed Transfer by the selling Tenaska Stockholder(s). 
 (b)    A Tenaska
Stockholder shall notify each Management Stockholder in writing in the event such Tenaska Stockholder proposes to make a Tag-Along Transfer at least seven (7) business days prior to the date on which such Tenaska Stockholder expects to
consummate such Transfer (the “Sale Notice”), which notice shall specify the number of shares of Common Stock and/or preferred stock convertible into Common Stock that the Third Party Purchaser intends to purchase in such Transfer.
The Tag-Along Right may be exercised by any Management Stockholder by delivery of a written notice to the Tenaska Stockholders proposing to sell Restricted Securities (the “Tag-Along Notice”) within seven (7) business days
following receipt of the Sale Notice from such Tenaska Stockholder(s). The Tag-Along Notice shall state the number of Restricted Securities that the Management Stockholder proposes to include in such Transfer to the proposed Third Party Purchaser
(not to exceed the number as determined above). In the event that the proposed Third Party Purchaser does not purchase the specified number of Restricted Securities from the Management Stockholder on the same terms and conditions as specified in the
Sale Notice, then the Tenaska Stockholder(s) shall not be permitted to sell any shares of Common Stock or preferred stock convertible into Common Stock to the proposed Third Party Purchaser unless the Tenaska Stockholder(s) purchase from the 

  

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Management Stockholder such specified number of Restricted Securities on the same terms and conditions as specified in such Sale Notice. 
 (c)    At the closing of the Tag-Along Transfer, the Third Party Purchaser (or the Tenaska Stockholder in the event that the Third
Party Purchaser does not purchase the specified number of Restricted Securities as contemplated in Section 4(b) above) shall remit to each Management Stockholder who exercised his Tag-Along Right the consideration for the total sales price of
the Restricted Securities held by such Management Stockholder sold pursuant hereto and minus any such consideration to be escrowed or otherwise held back in accordance with the Third Party Terms, against delivery by such Management
Stockholder of certificates for such Restricted Securities, duly endorsed for Transfer or with duly executed stock powers subject to the Tag-Along Right reasonably acceptable to the Company, and the compliance by such Management Stockholder with any
other conditions to closing generally applicable to the Tenaska Stockholder(s) and all other holders of Common Stock or preferred stock selling shares in such transaction. 
 (d)    For the purpose hereof, “Company Sale” shall mean (i) the consummation of any transaction or series of
transactions pursuant to which any Person or group of Persons (other than Tenaska Stockholders, its Affiliates or any transferee as a result of any liquidation or dissolution of any Tenaska Stockholder) becomes the beneficial owner (as that term is
used in Section 13(d) of the Exchange Act) directly or indirectly of fifty-percent (50%) or more of the Company’s capital entitled to vote in the election of the members of the Board of Directors of the Company or its successor(s);
(ii) the consummation of any consolidation or merger of the Company, other than a consolidation or merger of the Company in which the Tenaska Stockholder holds more than fifty-percent (50%) of the common stock of the surviving corporation
immediately after the consolidation or merger, or (ii) the sale of all or substantially all of the assets of the Company and its Subsidiaries taken as a whole. Notwithstanding the foregoing, no Company Sale will occur by Reason of the
Company’s contribution of assets to a Joint Venture. 
 Section 5.    Cooperation. 
 (a)    In the event that (i) the Board of Directors approves any transaction that constitutes a Tag-Along Transfer or
(ii) one or more Tenaska Stockholders notify the Management Stockholders that one or more Tenaska Stockholders intends to exercise its rights set forth in Section 3 hereof, each Management Stockholder shall consent to and raise no
objections against the transaction, and if the transaction is structured as a sale of stock, each Management Stockholder shall take all commercially reasonable and customary actions that the Board of Directors and the Tenaska Stockholders request in
connection with the consummation of the transaction. Without limiting the generality of the foregoing, each Management Stockholder agrees to (i) consent to and raise no objections against the transaction; (ii) execute any purchase
agreement, merger agreement or other agreement entered into with the Third Party Purchaser with respect to the transaction setting forth the Third Party Terms (provided, that escrow or hold back in such transaction is pro rata among all
sellers of shares in accordance with the number of shares sold by each of them) and any commercially reasonable and customary ancillary agreement with respect to any Company Sale; (iii) vote the shares held by the 

  

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Management Stockholder in favor of the transaction; and (iv) refrain from the exercise of dissenters’ appraisal rights with respect to his or her
Restricted Securities; provided that a Management Stockholder shall not be required to make representations or warranties other than reasonable and customary representations or warranties (x) regarding his or her ownership of and title to his
or her Restricted Securities and (y) made by management and officers in similar transactions. 
 (b)    If the
Company or the holders of the Company’s securities enter into any negotiation or transaction for which Rule 506 (or any similar rule then in effect) promulgated under the Act, may be available with respect to the negotiation or transaction
(including a merger, consolidation, or other reorganization), each Management Stockholder shall, if requested by the Company, appoint a “purchaser representative” (as defined in Rule 501 of the Act) reasonably acceptable to the Company. If
the purchaser representative is designated by the Company, the Company shall pay the fees of the purchaser representative, but if any Management Stockholder appoints another purchaser representative, the Management Stockholder shall be responsible
for the fees of the purchaser representative so appointed. 
 (c)    Each Management Stockholder shall bear its pro-rata
share of the costs of any transaction in which it sells Restricted Securities (based upon the number of shares of Common Stock and Vested Awards held by the Management Stockholder that are sold in such transaction) to the extent such costs are
incurred for the benefit of all holders of Common Stock (including preferred stock convertible into Common Stock) and Vested Awards and are not otherwise paid by the Company or the acquiring party; provided, however, a Management Stockholder
shall not be responsible for (i) any such costs that exceed the gross proceeds received by such Management Stockholder in such transaction or (ii) the fraud of any other seller or any indemnification obligations and liabilities for
breaches of representations and warranties made by any other seller with respect to such other seller’s (A) ownership of and title to shares of Common Stock, (B) organization, (C) authority and (D) conflicts and consents.

 (d)    Each Management Stockholder hereby agrees that if so requested by the Company (or any successor thereto) or
any representative of the underwriters (the “Managing Underwriter”) in connection with any registration of the offering of any securities of the Company under the Securities Act of 1933, as amended (the “Securities
Act”), the Management Stockholder shall not sell or otherwise transfer any Restricted Securities or other securities of the Company during the 180-day period (or such longer period as may be requested in writing by the Managing Underwriter
and agreed to in writing by the Company) (the “Market Standoff Period”) following the effective date of a registration statement of the Company filed under the Securities Act; provided, however, that such restriction shall
apply only to the first registration statement of the Company to become effective under the Securities Act that includes securities to be sold on behalf of the Company to the public in an underwritten public offering under the Securities Act. The
Company may impose stop-transfer instructions with respect to securities subject to the foregoing restrictions until the end of such Market Standoff Period. 
  

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 Section 6.    Confidentiality Provisions. 
 Each Management Stockholder acknowledges, represents, and agrees that: (i) the Company’s financial statements and any other Confidential Information (as
defined below) that the Company may, in its sole discretion, furnish to the Management Stockholders may contain confidential, proprietary, and material nonpublic information about the Company; (ii) he or she shall keep the Confidential
Information and all information therein secret and confidential; (iii) he or she shall hold the same in accordance with his or her customary procedures, if any, for handling confidential information acquired in an employment or consulting
arrangement or in connection with his or her investments; (iv) he or she shall not disclose the Confidential Information to anyone except (A) to Affiliates (that do not compete with, or engage in any of the same businesses as, the
Company), officers, directors, employees, agents or advisors, who are directly involved in the administration of his or her stockholding in the Company, all of whom must be advised of and agree to adhere to the terms of this Section 6,
(B) as required by law, (C) as requested or required by law or any provincial, state, federal, national or foreign authority or examiner, or (D) to the extent necessary to enforce his or her rights hereunder; (v) he or she may be
responsible for any breach of the terms of this Section 6 committed by anyone, other than a Company employee, officer, director or agent, to whom he or she disclosed the Confidential Information; (vi) he or she shall not use the
Confidential Information or any information therein for any purpose other than for appropriate purposes in connection with his or her employment or consulting relationship with the Company, if any, and his or her stockholding in the Company; and
(vii) in the event of any breach of the terms of this Section 6, the Company shall be entitled to specific performance and/or injunctive relief (without bond) as a remedy for any such breach, in addition to all other remedies available at
law or in equity. The prevailing party shall be entitled to reimbursement of all reasonable legal fees and litigation expenses incurred in enforcing or defending the terms of this Section 6. For purposes of this Agreement, the term
“Confidential Information” shall mean all non-public information concerning trade secret, know-how, software, developments, inventions, processes, technology, designs, the financial data, strategic business plans or any proprietary
or confidential information, documents or materials in any form or media, including any of the foregoing which gives the Company competitive advantage and which the Company has taken reasonable steps to protect relating to research, operations,
finances, current and proposed products and services, vendors, customers, advertising and marketing, and other non-public, proprietary, and confidential information of the Restricted Group, and the term “Restricted Group” shall
mean, collectively, the Company, its Subsidiaries, the Tenaska Stockholders, the members and partners of the Tenaska Stockholders and each Affiliate of any of the foregoing. Notwithstanding the foregoing, “Confidential Information” shall
not include information that is or has become part of the public domain other than as a result of a disclosure by a Management Stockholder in breach of this Section 6 or any other obligation of confidentiality. 
 Section 7.    Termination. This Agreement shall terminate on the complete liquidation of the Company, an initial public
offering of the Company’s shares or a Company Sale, or the sale, lease or other disposition by the Company of all or substantially all of the Company’s assets. 
  

 11 

 Section 8.    Miscellaneous. 
 (a)    Legends. Each certificate representing the Restricted Securities shall bear the following legends: 
 “THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR THE
SECURITIES LAWS OF ANY STATE AND MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT AND SAID LAWS OR AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS THEREOF.” 
 “THE SECURITIES REPRESENTED HEREBY ARE SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AND CERTAIN OTHER AGREEMENTS SET FORTH IN A STOCKHOLDERS
AGREEMENT BETWEEN THE ISSUER AND THE INITIAL HOLDER HEREOF DATED AS OF DECEMBER 12, 2007. A COPY OF SUCH AGREEMENT SHALL BE FURNISHED WITHOUT CHARGE BY THE ISSUER TO THE HOLDER HEREOF UPON WRITTEN REQUEST.” 
 (b)    Successors, Assigns and Transferees. This Agreement shall be binding upon and inure to the benefit of the Parties
hereto and their respective legal representatives, heirs, legatees, successors, and assigns and any other transferee of the Restricted Securities and shall also apply to any Restricted Securities acquired by any Management Stockholder after the date
hereof. 
 (c)    Management Stockholder Representation. The Management Stockholder hereby represents that the
Management Stockholder’s execution of this Agreement and participation in the Equity Plan is voluntary and the Management Stockholder has in no way been induced to enter into this Agreement in exchange for or as a requirement of the expectation
of employment or continued employment with the Company or any of its Subsidiaries. 
 (d)    Specific Performance,
Etc. Each Party, in addition to being entitled to exercise all rights provided herein or granted by law, including recovery of damages, shall be entitled to specific performance of the Party’s rights under this Agreement. Each Party agrees
that monetary damages would not be adequate compensation for any loss incurred by reason of a breach by the Party of the provisions of this Agreement and each Party hereby agrees to waive the defense in any action for specific performance that a
remedy at law would be adequate. 
 (e)    Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of Washington. 
 (f)    Interpretation. The headings of the Sections
contained in this Agreement are solely for the purpose of reference, are not part of the agreement of the Parties and shall not affect the meaning or interpretation of this Agreement. 
  

 12 

 (g)    Notices. All notices and other communications provided for or
permitted hereunder shall be in writing and shall be deemed to have been duly given and received when delivered by overnight courier or hand delivery, when sent by telecopy, or five (5) days after mailing if sent by registered or certified mail
(return receipt requested) postage prepaid, to the Parties at the following addresses (or at such other address for any Party as shall be specified by like notices, provided that notices of a change of address shall be effective only upon receipt
thereof). 
  

	 	(i)	If to any Tenaska Stockholder: 

 Tenaska Power Fund LP

 1044 North 115th Street, Suite 400 
 Omaha, Nebraska 68154-4446 
 Attn: Controller 
 Facsimile: 402-691-9727 
 with a mandatory copy to: 
 Latham & Watkins LLP 
 555
Eleventh Street, N.W. 
 Suite 1000 
 Washington, D.C. 20004 
 Attention: John Sachs 
 Facsimile: 202-637-2201 
 (ii) If to a Management Stockholder, to the address set forth on the Management
Stockholder’s signature page hereto. 
 (h)    Recapitalization, Exchange, Etc. Affecting the Company’s
Stock. The provisions of this Agreement shall apply, to the full extent set forth herein, with respect to any and all shares of Common Stock, Vested Awards, and all of the shares of capital stock of the Company or any successor or assign of the
Company (whether by merger, consolidation, sale of assets, or otherwise) that may be issued in respect of, in exchange for, or in substitution of such Common Stock and Vested Awards and shall be appropriately adjusted for any stock dividends,
splits, reverse splits, combinations, recapitalizations, and the like occurring after the date hereof. 
 (i)    Counterparts. This Agreement may be executed in two (2) or more counterparts, each of which shall be deemed to be an original and all of which together shall be deemed to constitute one and the same
agreement. 
 (j)    Severability. In the event that any one or more of the provisions contained herein, or the
application thereof in any circumstances, is held invalid, illegal, or unenforceable in any respect for any reason, the validity, legality, and enforceability of any such provision in every other respect and of the remaining provisions contained
herein shall not be in any way impaired thereby. 
  

 13 

 (k) Amendment. This Agreement may be amended by resolution of the Board of Directors; provided,
however, that any amendment that materially adversely effects any Management Stockholder shall not be effective against such Management Stockholder unless consented to by him or her. At any time hereafter, additional Management Stockholders may be
made parties hereto by executing a signature page in the form attached as Exhibit A hereto, which signature page shall be countersigned by the Company and shall be attached to this Agreement and become a part hereof without any further action of any
other Party hereto. 
 (l) Tax Withholding. The Company or any Subsidiary, as applicable, shall be entitled to require payment in
cash or deduction from other compensation payable to any Management Stockholder of any sums required by federal, state, or local tax law to be withheld with respect to the issuance, vesting, exercise, repurchase, or cancellation of any Restricted
Share or any option to purchase Restricted Securities. 
 (m) No Additional Rights. Nothing contained in this Agreement
(i) obligates the Company or any Affiliate of the Company to employ any Management Stockholder in any capacity whatsoever; (ii) confers upon any Management Stockholder the right to continue to serve as a Director; (iii) prohibits or
restricts the Company or any Affiliate of the Company from terminating the employment, if any, of any Management Stockholder at any time or for any reason whatsoever, with or without cause; (iv) prohibits or restricts the Company or any
Affiliate from terminating a Consultant’s service at any time for any reason with or without cause, except to the extent expressly provided otherwise in writing; or (v) restricts in any way the rights of the stockholders of the Company or
any of its Subsidiaries, to remove any Management Stockholder as a Director at any time for any reason whatsoever. Each Management Stockholder hereby acknowledges and agrees that neither the Company, any of its Subsidiaries nor any other person has
made any representations or promises whatsoever concerning his or her employment, consultancy or directorship, or continued employment or consultancy by the Company or any Affiliate of the Company, except pursuant to any employment agreement by and
between the Management Stockholder and the Company or any Affiliate of the Company in effect from time to time for so long as this Agreement remains in effect. 
 (n) Offsets. The Company shall be permitted to offset and reduce from any amounts payable to a Management Stockholder the amount of any indebtedness or other obligation or payment owing to the Company by the
Management Stockholder. The Company shall provide the Management Stockholder a detailed statement of the basis for any amount withheld signed by an officer of the Company. 
 (o) Entire Agreement. This writing constitutes the entire agreement of the Parties with respect to the subject matter hereof. 
 [signature pages follow] 
  

 14 

 IN WITNESS WHEREOF, the undersigned have executed this Agreement on the date first written above.

  

			
	 InfrastruX Holdings, LLC,

	a Delaware limited liability company
		
	By:	 	 TPF Power, Inc., a Delaware corporation

	 Its:
	 	Manager
		
	By:	 	 /s/    Paul G. Smith

		 	 Name: Paul G. Smith

		 	Title: President & CEO
	
	INFRASTRUX GROUP, INC.
		
	By:	 	 /s/    Michael T. Lennon

		 	 Name: Michael T. Lennon

		 	Title: President & CEOEmployment Agreement - Michael T. Lennon

 Exhibit 10.11 
 Employment Agreement 
 This Employment Agreement (this “Agreement”) is dated as of
May 8, 2006, and is made by and between InfrastruX Group, Inc., a Washington corporation (“Employer”) and Michael T. Lennon (“Employee”). 
 W I T N E S S E T H: 
 WHEREAS, Employer and Employee have entered into an Employment Agreement dated May 6, 2002 (“Prior Agreement”) pursuant to which Employer employs the Employee; and 
 WHEREAS, Employer and Employee each have determined that it is desirable to terminate the Prior Agreement and enter into this Agreement pursuant to which
Employer agrees to continue to employ the Employee and Employee agrees to continue providing services to the Employer upon the terms and conditions set forth herein; and 
 A G R E E M E N T S: 
 NOW, THEREFORE,
for and in consideration of the foregoing premises and for other good and valuable consideration, the sufficiency and receipt of which are hereby acknowledged, Employer and Employee hereby agree as follows: 
  

	1.	EFFECTIVE DATE 

 This agreement shall be effective
as of May 8, 2006. 
  

	2.	EMPLOYMENT 

 Employer will continue employing
Employee and Employee agrees to continue employment with Employer as its President and Chief Executive Officer. Employee will have the authority and will perform the duties customarily performed by the President and Chief Executive Officer of a
corporation which is similar to Employer and such other duties as may be assigned from time to time by the Board of Directors of Employer (the “Board”), which relate to the business of Employer, its subsidiaries, or any business ventures
in which Employer or its subsidiaries may participate. Employee shall report directly to the Board. 
 So long as Employee is employed by
Employer, Employer shall nominate Employee to serve on the Board. 
  

	3.	ATTENTION AND EFFORT 

 Employee will devote his full
business time, ability, attention and effort to Employer’s business and will skillfully serve its interests during the term of this Agreement; provided, however, that Employee may devote reasonable periods of time to
(a) engaging in personal 

 
investment activities, (b) serving on the board of directors of other corporations, and (c) engaging in charitable or community service activities,
so long as none of the foregoing additional activities in (a) through (c) materially interfere with Employee’s duties under this Agreement. 
  

	4.	TERM 

 Unless otherwise terminated pursuant to
Section 7, Employee’s term of employment under this Agreement shall expire on the second anniversary of the date of this Agreement (“Expiration Date”). This Agreement shall automatically be renewed for successive one-year
terms unless the party wishing to terminate this Agreement does so by providing written notice to the other party no less than six (6) months prior to the Expiration Date. Upon renewal of this Agreement, the term “Expiration Date”
will refer to the end of the one-year renewal period. 
  

	5.	COMPENSATION 

 During the term of this Agreement,
Employer agrees to pay or cause to be paid to Employee, and Employee agrees to accept in exchange for the services rendered hereunder by him, the following compensation: 
  

	 	5.1	Base Salary 

 Employee’s compensation shall
consist, in part, of an annual base salary of $400,400 (the “Base Salary”) before all customary payroll deductions. Such annual base salary shall be paid in substantially equal installments and at the same intervals as other
officers of Employer are paid. The Board (or a committee thereof shall determine any increases in the amount of the annual base salary in future years. 
  

	 	5.2	Bonus 

 Employee shall be eligible to receive, in
addition to the Base Salary, an annual cash bonus in an amount to be determined by the Board, which bonus shall be based upon the financial performance of Employer as follows: 
 (a) In the event Employer achieves a level of financial performance characterized as “in-the-money” by the Board, Employee shall receive a
bonus payment equal to 20% of the Base Salary. 
 (b) in the event Employer achieves a level of financial performance characterized as
“target” by the Board, Employee shall receive a bonus payment equal to 50% of the Base Salary. 
 (c) In the event Employer
achieves a level of financial performance characterized as “outstanding” by the Board, Employee shall receive a bonus payment equal to 80% of the Base Salary. 
  

 2 

	 	5.3	Equity Compensation 

 (a) The Board shall grant
Employee a combination of restricted stock units and stock appreciation rights equal to 1.8% of the equity of the Employer on a fully diluted basis on the date of this Agreement under the terms of Employer’s 2006 Equity Compensation Plan Such
grants shall be subject to the vesting and exercise provisions set forth on Exhibit A hereto. 
 (b) Employee, along with such other senior
management team of the Employer as selected by the Board shall be allowed to purchase in the aggregate up to four percent (4%) of the fully diluted membership interest in InfrastruX Holdings, LLC, the immediate parent company of Employer, upon
the same valuation as TPF InfrastruX Holdings, LLC. The Board in consultation with Employee shall determine the amount Employee and each other senior management employee will be allowed to purchase, any minimum purchase amount and any other terms of
such purchase. Such determination and investment by Employee must be made within ninety (90) days of the date of this Agreement. As part of such investment Employee and each other senior management employee who exercises their right to purchase
will be required to become a party to a stockholders agreement outlining the rights and responsibilities of the Employer’s stockholders, including drag along and tag along rights in the event of a sale of all or a portion, of InfrastruX
Holdings LLC’s ownership interest in Employer, as well as rights of first refusal and call rights upon termination of employment. 
  

	6.	BENEFITS 

 During the term of this Agreement,
Employee will be entitled to participate in all benefit programs as shall be provided or offered from time to time to senior executive-level employees of Employer, subject to and in accordance with applicable eligibility requirements. 
  

	7.	TERMINATION 

 Employment of Employee pursuant to
this Agreement may be terminated as follows: 
  

	 	7.1	By Employer 

 With or without Cause (as defined
below), Employer may terminate the employment of Employee at any time during the term of employment by giving written notice to Employee. The notice shall be effective immediately if termination is for Cause and sixty (60) days later if
termination is not for Cause. 
  

	 	7.2	By Employee 

 Employee may terminate his employment
at any time, for any reason, upon giving sixty (60) days’ prior written notice. 
  

 3 

	 	7.3	Automatic Termination 

 Employee’s employment
hereunder shall terminate automatically upon the death or total disability of Employee. The term “total disability” as used herein shall mean a long-term disability that entitles Employee to receive long-term disability benefits
under the Employer’s long-term disability plan or policy applicable to Employee, or in the absence of such a plan or policy, the Employee’s inability to perform the duties set forth in Section 2 hereof for a period or periods
constituting ninety (90) consecutive calendar days as a result of physical or mental illness, loss of legal capacity or any other cause beyond Employee’s control, unless Employee is granted a leave of absence by the Board. Termination
hereunder shall be deemed to be effective (a) at the end of the calendar month in which Employee’s death occurs or (b) immediately upon a determination by the Board of Employee’s total disability, as defined herein. 

 

	8.	TERMINATION PAYMENTS 

 In the event of termination
of the employment of Employee, all compensation and benefits set forth in this Agreement shall terminate except as specifically provided in this Section 8: 
  

	 	8.1	Termination by Employer 

 If Employer terminates
Employee’s employment without Cause prior to the Expiration Date, Employee shall be entitled to receive (a) termination payments equal to one year of Base Salary, and (b) any unpaid Base Salary which has accrued for services already
performed as of the date of termination (“Termination Date”). If Employee is terminated by Employer for Cause (as defined in Section 8.4 below), Employee shall not be entitled to receive any of the foregoing benefits, other than those
set forth in clause (b) above. 
  

	 	8.2	Termination by Employee 

 (a) If Employee resigns
for Good Reason prior to the Expiration Date, Employee shall be entitled to receive the same termination payments and unpaid annual base salary as provided for in Section 8.1 for a termination without Cause. “Good Reason” means only
any one or more of the following: (1) material breach by Employer of this Agreement, and its failure to cure such breach within thirty (30) days after written notice from Employee to Employer specifying in reasonable detail the alleged
breach; (2) reduction, without Employee’s consent, of Employee’s salary or reduction or elimination of any compensation or benefit plan benefiting Employee, unless the reduction or elimination of such benefit plan is generally
applicable to all senior executive-level employees (or employees of a successor or controlling entity of Employer) and unless Employer reinstates the compensation or benefit within thirty (30) days after written notice from Employee;
(3) assignment to Employee, without his consent, of duties materially inconsistent with Employee’s position, authority, duties or responsibilities as contemplated by Sections 2 and 3 hereof (or such higher level of position, authority,
duties or responsibilities as are subsequently assigned to Employee), which results in a material diminution in such position, authority, duties or responsibilities; or (4) involuntary relocation of 

  

 4 

 
Employee’s Primary Work Location by more than forty-five (45) miles from Employee’s current work location. For this purpose “Primary Work
Location” means as of any time the Employee’s primary work location in either Bellevue, Washington or Pittsburgh, Pennsylvania as elected by the Employee in his discretion. 
 (b) In the case of the termination of Employee’s employment by Employee for other than Good Reason, Employee shall not be entitled to any payments
hereunder, other than those set forth in clause (b) of Section 8.1 hereof. 
  

	 	8.3	Payment Schedule 

 All payments under this
Section 8 shall be made to Employee at the same interval as payments of salary were made to Employee immediately prior to termination. 
  

	 	8.4	Cause 

 Wherever reference is made in this Agreement
to termination being with or without Cause, “Cause” shall mean: 
 (a) willful misconduct on the part of Employee that has a
material adverse effect on Employer and its subsidiaries, taken as a whole; 
 (b) Employee’s engaging in (i) conduct which could
reasonably result in his conviction of a felony or a crime against Employer, (ii) conduct involving fraud or moral turpitude, or (iii) substance abuse or other misconduct which would materially compromise Employer’s reputation or
Employee’s ability to perform his duties; 
 (c) unreasonable refusal by Employee to perform the duties and responsibilities of his
position in any material respect, unless Employee cures the refusal within thirty (30) days after receipt of written notice specifying in reasonable detail the duties and responsibilities not being performed; or 
 (d) violation of the covenants set forth in Section 10 hereof. 
 No action, or failure to act, shall be considered willful or unreasonable if the Employee did it in good faith and with the reasonable belief that his action or omission was in the best interests of Employer.

  

	9.	RECORDS AND CONFIDENTIAL DATA 

  

	 	9.1	Acknowledgement. 

 The Employee acknowledges that,
in connection with the performance of his duties for the Employer as an employee under the terms of this Agreement, that the Employer has made and will make available to the Employee, or the Employee will have access to, certain Confidential
Information of the Employer and its affiliates. The Employee acknowledges and 

  

 5 

 
agrees that any and all Confidential Information learned or obtained by the Employee during the course of the Employee’s employment by the Employer or
otherwise (including, without limitation, information that the Employee obtained through or in connection with the Employee’s employment with the Employer prior to the date hereof) whether developed by the Employee alone or in conjunction with
others or otherwise, shall be and is the property of the Employer and its affiliates. 
  

	 	9.2	Confidentiality Obligations. 

 The Employee shall at
all times keep all Confidential Information confidential and will not use such Confidential Information other than in connection with the Employee’s discharge of the Employee’s duties hereunder, and will use reasonable efforts to safeguard
the Confidential Information from unauthorized disclosure. This covenant is not intended to, and does not limit in any way the Employee’s duties and obligations to the Employer under statutory and common law not to disclose or make personal use
of the Confidential Information or trade secrets. 
  

	 	9.3	Return of Confidential Information 

 Promptly, but
no later than five (5) business days following the termination of Employee’s employment with the Employer, the Employee will return to the Employer all written Confidential Information in his possession which has been provided to the
Employee and the Employee will destroy all copies of any analyses, compilations, studies or other documents prepared by the Employee or for the Employee’s use containing or reflecting any Confidential Information. The Employee shall, upon
written request of the Employer and within five (5) business days of the receipt of such request by the Employee, deliver to the Employer a document certifying that, to the best of his knowledge, such written Confidential Information has been
returned or destroyed in accordance with this Section 9.3. 
  

	 	9.4	Definition 

 For the purposes of this Agreement,
“Confidential Information” shall mean all confidential and proprietary information of the Employer, and any of its subsidiaries, including, without limitation, the Employer’s contractor, customer, supplier and vendor lists and
information, marketing strategies, pricing policies or characteristics, product or product specifications, designs, software systems, leasing costs, cost of equipment, business or business prospects, plans, proposals, codes, marketing studies,
research, reports, investigations, trade secrets or other information of similar character. For purposes of this Agreement, Confidential Information shall not include (i) information which is available to the public, (ii) information
obtained by the Employee from third persons other than employees or Employees of the Employer, its subsidiaries, the Employer and the Employer’s affiliates not under agreement to maintain the confidentiality of the same, and
(iii) information which is required to be disclosed by law or legal process. 
  

 6 

	10.	ADDITIONAL COVENANTS 

  

	 	10.1	Non-interference with Accounts 

 The Employee
acknowledges and agrees that the Employer’s customers and Confidential Information are important business assets of the Employer. Accordingly, the Employee covenants and agrees that during Employee’s employment with the Employer, and for
one (1) year following termination of Employee’s employment (the “Post-Termination Period”), the Employee shall not directly or indirectly, personally or on behalf of any other person, business, corporation, or entity, sell or
otherwise provide or solicit the sale or provision of any product, process or service in the Field (as defined below) (“Product”), that competes directly with any Product of the Employer, to any of the Employer’s customers (
“Customers”). For purposes of this Agreement, (i) Field shall mean the field of construction and other infrastructure services to electric and/or gas utilities, and (ii) Customers shall mean any customers of the Employer to or through
which the Employer sold or provided any Products during the twelve (12) month period prior to the termination of the Employee’s employment. 
  

	 	10.2	No Diversion 

 The Employee covenants and agrees
that (i) during the Employee’s employment with the Employer, and (ii) for the Post-Termination Period, the Employee shall not intentionally divert or attempt to divert or take advantage of or attempt to take advantage of any actual or
potential business opportunities of the Employer in which it has current interest or expectancy (e.g., joint ventures, other business combinations, investment opportunities, relationships with contractors, customers, suppliers and vendors of
the Employer, and other similar opportunities) which the Employee became aware of as the result of and during the Employee’s employment with the Employer. Notwithstanding anything to the contrary in the foregoing, this shall not limit the
Employee from investing in or serving on the board of directors of any entity that is not in the Field. 
  

	 	10.3	Non-competition 

 The Employee acknowledges and
agrees that the Employer’s Confidential Information is an important business asset of the Employer. In addition, the Employee acknowledges and agrees that he has and will continue to play an integral role in the development and maintenance of
goodwill between the Employer and its customers. Accordingly, in order to protect the Employer’s Confidential Information and customer goodwill, the Employee covenants and agrees that (i) during the Employee’s employment with the
Employer, and (ii) for the Post-Termination Period, the Employee shall not knowingly directly or indirectly own an interest in, operate, join, control, advise, consult to, work for, serve as a director or manager of, have a financial interest
in, or participate in any corporation, partnership, proprietorship, firm, association, person, or other entity that engages (or engaged) in the Field (“Employer Activities”). This Covenant applies to Employer Activities in any territory or
jurisdiction in which the Employer is doing business or is making an active effort to do business during the term of the Employee’s service. This Covenant does not prohibit the Employee from (i) being 

  

 7 

 
employed by or acting as a consultant or otherwise providing services to an employer in the construction industry in general, so long as he personally does
not perform any services or otherwise engage in the Field and does not use or disclose any Confidential Information in connection therewith, or (ii) the mere passive ownership of less than one percent (1%) of the outstanding stock of any
public corporation as long as the Employee is not otherwise in violation of this Covenant. 
  

	 	10.4	Non-recruitment 

 The Employee agrees that the
Employer has invested substantial time and effort in assembling its present workforce. Accordingly, the Employee covenants and agrees that during Employee’s employment with the Employer and for the Post-Termination Period, the Employee shall
not directly or indirectly entice or solicit any of the Employer’s employees or contractors to leave their employment or engagement with the Employer. 
  

	11.	ENFORCEMENT OF COVENANTS 

  

	 	11.1	Remedies 

 The Employee acknowledges that should he
violate any of the covenants contained in Sections 9 and 10 above (collectively “Covenants”), it will be difficult to determine the resulting damages to the Employer and, in addition to any other remedies the Employer may have, the
Employer shall be entitled to seek temporary injunctive relief without being required to post a bond and permanent injunctive relief without the necessity of proving actual damage. The Employer may elect to seek one or more of these remedies at the
Employer’s sole discretion on a case by case basis. Failure to seek any or all remedies in one case shall not restrict the Employer from seeking any remedies in another situation. Such action by the Employer shall not constitute a waiver of any
of the Employer’s rights. 
  

	 	11.2	Severability and Modification of Any Unenforceable Covenant 

 It is the parties’ intent that each of the Covenants be read and interpreted with every reasonable inference given to its enforceability. However, it is also the parties’ intent that if any term, provision or condition of the
Covenants is held to be invalid, void or unenforceable, the remainder of the provisions thereof shall remain in full force and effect and shall in no way be affected, impaired or invalidated. Finally, it is also the parties’ intent that if it
is determined that any of the Covenants are unenforceable because of overbreadth, then the Covenants shall be modified so as to make such Covenants reasonable and enforceable under the prevailing circumstances. 
  

	 	11.3	Construction 

 Any reference to the Employer in this
Section 11 shall include the Employer and all of its subsidiaries. 
  

 8 

	 	11.4	Tolling 

 In the event of the breach by the Employee
of any Covenant, the running of the period of restriction shall be automatically tolled and suspended for the amount of time that the breach continues, and shall automatically recommence when the breach is remedied so that the Employer shall receive
the benefit of the Employee’s compliance with the Covenants. This Section 11.4 shall not apply to any period for which the Employer is awarded and receives actual monetary damages for breach by the Employee of a Covenant with respect to
which this Section 11.4 applies. 
  

	12.	NOTICE AND CURE OF BREACH 

 Whenever a breach of
this Agreement by either party is relied upon as justification for any action taken by the other party pursuant to any provision of this Agreement, the party asserting the breach of this Agreement shall give the other party at least (30) thirty
days’ prior written notice of the existence and the nature of such breach before taking further action hereunder and shall give the party purportedly in breach of this Agreement the opportunity to correct such breach during the 30-day period.

  

	13.	FORM OF NOTICE 

 All notices given hereunder shall
be given in writing, shall specifically refer to this Agreement and shall be personally delivered or sent by telecopy or other electronic facsimile transmission or by registered or certified mail, return receipt requested, at the address set forth
below or at such other address as may hereafter be designated by notice given in compliance with the terms hereof: 
  

			
	If to Employee:	  	Michael T. Lennon
		  	939 18th Avenue
East
		  	Seattle, WA 98112
		
	If to Employer:	  	InfrastruX Group, Inc.
		  	Skyline Towers
		  	10900 N.E. Fourth Ave., Suite 1900
		  	Bellevue, WA 98004
		  	Attn: Chief Operating Officer
		
	Copy to:	  	InfrastruX Holdings, LLC
		  	c/o Tenaska Power Fund, L.P.
		  	1044 North 115th Street,
Suite 400
		  	Omaha, NE 68154-4446
		  	Attention: Daniel Lonergan

  

 9 

 If notice is mailed, such notice shall be effective upon mailing, or if notice is personally delivered or
sent by telecopy or other electronic facsimile transmission, it shall be effective upon receipt. 
  

	14.	INDEMNIFICATION 

 Employer shall defend, indemnify
and hold Employee harmless from any and all liabilities, obligations, claims or expenses which arise in connection with or as a result of Employee’s service as an officer, employee or director of the Employer and/or any of its affiliates and
subsidiaries to the fullest extend allowed by law. The Employer shall assure that Employee remains covered by the Employer’s policies of directors’ and officers’ liability insurance for six years following the date of termination of
the last position (employee, officer or director) to terminate. 
  

	15.	ASSIGNMENT 

 This Agreement is personal to Employee
and shall not be assignable by Employee. Employer may assign its rights hereunder to (a) any corporation resulting from any merger, consolidation or other reorganization to which Employer is a party or (b) any corporation, partnership,
association or other person to which Employer may transfer all or substantially all of the assets and business of Employer existing at such time. All of the terms and provisions of this Agreement shall be binding upon and shall inure to the benefit
of and be enforceable by the parties hereto and their respective successors and permitted assigns. 
  

	16.	WAIVERS 

 No delay or failure by any party hereto in
exercising, protecting or enforcing any of its rights, titles, interests or remedies hereunder, and no course of dealing or performance with respect thereto, shall constitute a waiver thereof. The express waiver by a party hereto of any right,
title, interest or remedy in a particular instance or circumstance shall not constitute a waiver thereof in any other instance or circumstance. All rights and remedies shall be cumulative and not exclusive of any other rights or remedies.

  

	17.	ARBITRATION 

 Any controversies or claims arising
out of or relating to this Agreement shall be fully and finally settled by arbitration in accordance with the Commercial Arbitration Rules of the American Arbitration Association then in effect (the “AAA Rules”), conducted by one
arbitrator either mutually agreed upon by Employer and Employee or chosen in accordance with the AAA Rules, except that the parties thereto shall have any right to discovery as would be permitted by the Federal Rules of Civil Procedure for a period
of 90 days following the commencement of such arbitration and the arbitrator thereof shall resolve any dispute which arises in connection with such discovery. The prevailing party shall be entitled to costs, expenses and reasonable attorneys’
fees, and judgment upon the award rendered by the arbitrator may be entered in any court having jurisdiction thereof. 
  

 10 

	18.	AMENDMENTS IN WRITING 

 No amendment, modification,
waiver, termination or discharge of any provision of this Agreement, nor consent to any departure therefrom by either party hereto, shall in any event be effective unless the same shall be in writing, specifically identifying this Agreement and the
provision intended to be amended, modified, waived, terminated or discharged and signed by Employer and Employee, and each such amendment, modification, waiver, termination or discharge shall be effective only in the specific instance and for the
specific purpose for which given. No provision of this Agreement shall be varied, contradicted or explained by any oral agreement, course of dealing or performance or any other matter not set forth in an agreement in writing and signed by Employer
and Employee. 
  

	19.	APPLICABLE LAW 

 This Agreement shall in all
respects, including all matters of construction, validity and performance, be governed by, and construed and enforced in accordance with, the laws of the State of Washington, without regard to any rules governing conflicts of laws. 
  

	20.	SEVERABILTTY 

 If any provision of this Agreement
shall be held invalid, illegal or unenforceable in any jurisdiction, for any reason, including, without limitation, the duration of such provision, its geographical scope or the extent of the activities prohibited or required by it, then, to the
full extent permitted by law (a) all other provisions hereof shall remain in full force and effect in such jurisdiction and shall be liberally construed in order to carry out the intent of the parties hereto as nearly as may be possible,
(b) such invalidity, illegality or unenforceability shall not affect the validity, legality or enforceability of any other provision hereof, and (c) any court or arbitrator having jurisdiction thereover shall have the power to reform such
provision to the extent necessary for such provision to be enforceable under applicable law. 
  

	21.	HEADINGS 

 All headings used herein are for
convenience only and shall not in any way affect the construction of, or be taken into consideration in interpreting this Agreement. 
  

	22.	COUNTERPARTS 

 This Agreement, and any amendment or
modification entered into pursuant to Section 18 hereof, maybe executed in any number of counterparts, each of which counterparts, when so executed and delivered, shall be deemed to be an original and all of which counterparts, taken together,
shall constitute one and the same instrument. 
  

	23.	ENTIRE AGREEMENT 

 This Agreement comprises the
entire agreement between the parties hereto relating to the subject matter hereof and, supersedes, cancels and annuls all previous agreements, including the 

  

 11 

 
Prior Agreement between the Employer (and/or its predecessors) and Employee, as the same may have been amended or modified, and any right of Employee
thereunder other than for compensation accrued thereunder as of the date hereof, and supersedes, cancels and annuls all other prior written and oral agreements between Employee and Employer or any predecessor thereto. The terms of this Agreement are
intended by the parties to be the final expression of their agreement with respect to the retention of Employee by Employer and may not be contradicted by evidence of any prior or contemporaneous agreement. 
 IN WITNESS WHEREOF, the parties have executed entered into this Agreement on the date set forth above. 
  

			
	 /s/ MICHAEL T. LENNON

	MICHAEL T. LENNON
	
	INFRASTRUX GROUP, INC.
		
	By:	 	 /s/ RICHARD SCHWARTZ

		 	RICHARD SCHWARTZ
		 	CHIEF OPERATIONS OFFICER

  

 12 

 EXHIBIT A 
  

	•	 	 Awards will vest 75% based on performance and 25% based on time 

  

	•	 	 Time-based awards of SARS and RSUs vest at the rate of 25% per year on the 1st – 4th anniversaries of grant or upon the earlier occurrence of a liquidity
event 

  

	•	 	 Shares subject to vested RSUs will be delivered only upon the earlier of a liquidity event or termination of employment 

  

	•	 	 Performance-based awards will vest at the liquidity event according to the following schedule, based on the return to its total equity investment:

 If liquidity event is within first year then l.25X 
 If liquidity event is after first year but before second year, then 1.50X; 
 If liquidity event is after second year but before third year, then l.75X; and 
 If liquidity event is after
the third year, then 2X 
  

	•	 	 Any awards that vest prior to a liquidity event cannot be exercised until the earlier of a liquidity event or termination of employment

  

	•	 	 Base price for SARs will equal the fair market value of a share of the new Company based on the value of the equity at the time of the transaction

  

	•	 	 SARs expire 10 years from grant 

  

	•	 	 Treatment upon termination: 

  

	 	•	 	 Death/Disability/Retirement: Forfeiture of unvested awards/ vested SARs exercisable, RSU shares deliverable 

  

	 	•	 	 Without Cause: Forfeiture of unvested awards/ vested SARs exercisable/RSUs deliverable 

  

	 	•	 	 Cause: Forfeiture of vested and unvested awards 

  

	 	•	 	 Resignation: Forfeiture of unvested awards/ vested SARs exercisable/RSUs deliverable 

  

	•	 	 Shares delivered upon exercise of vested awards will be subject to the following call rights: 

  

	 	•	 	 At fair market value (as determined by Board) if termination is without cause, for good reason, death, disability or retirement 

  

	 	•	 	 Fair market value less five % if termination is resignation not for good reason 

  

	 	•	 	 Call right will expire 180 days after an initial public offering of the company 

  

	•	 	 Put right at fair market value will apply in the event of death

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