FIRST AMENDMENT TO FOURTH AMENDEDAND RESTATED CREDIT AGREEMENT

Exhibit 10.2

FIRST AMENDMENT TO

FOURTH AMENDED AND RESTATED CREDIT AGREEMENT

This FIRST AMENDMENT TO FOURTH AMENDED AND RESTATED CREDIT AGREEMENT dated as of June 27, 2016 (this “Agreement”) is entered into among Quanta Services, Inc., a Delaware corporation (the “Company”), the Australian Borrowers, the Canadian Borrowers, the Guarantors, the Lenders party hereto and Bank of America, N.A., as Administrative Agent, Domestic Swing Line Lender and an L/C Issuer. All capitalized terms used herein and not otherwise defined herein shall have the meanings given to such terms in the Credit Agreement (as defined below).

RECITALS

WHEREAS, the Borrowers, the Guarantors, the Lenders and the Administrative Agent entered into that certain Fourth Amended and Restated Credit Agreement dated as of December 18, 2015 (as amended and modified from time to time, the “Credit Agreement”);

WHEREAS, the Company has requested that the Lenders amend the Credit Agreement as set forth in Section 1 below; and

WHEREAS, the Lenders have agreed to provide the requested amendments, subject to the terms and conditions set forth herein;

NOW, THEREFORE, in consideration of the premises and the mutual covenants contained herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

1. Amendments.

(a) In the definition of “Disposition” in Section 1.01 of the Credit Agreement:

(i) Clause (iii) of the first sentence is hereby amended and restated in its entirety to read as follows:

(iii) any sale, rental, lease, license, transfer or other disposition of Property by the Company or any Subsidiary (directly or indirectly) to any Loan Party, provided that the Loan Parties shall cause to be executed and delivered such documents, instruments and certificates as the Administrative Agent may reasonably request so as to cause the Loan Parties to be in compliance with the terms of Section 7.14 after giving effect to such transaction,

(ii) The second reference to “(vii)” in the first sentence is hereby replaced with a reference to “(viii)”.

(b) The last sentence in the definition of “Disposition” in Section 1.01 of the Credit Agreement is hereby amended to delete the “or” immediately preceding clause (y), replace it with a comma and add the following immediately preceding the period:

or (z) any Restricted Payment permitted under Section 8.06

(c) Clause (a) of Section 8.06 of the Credit Agreement is hereby amended and restated in its entirety to read as follows:

(a) (i) each Subsidiary may make Restricted Payments (directly or indirectly) to any Loan Party and (ii) each Foreign Subsidiary may make Restricted Payments (directly or indirectly) to any other Foreign Subsidiary;

2. Conditions Precedent. This Agreement shall be effective upon receipt by the Administrative Agent of counterparts of this Agreement duly executed by each of the Borrowers, the Guarantors, the Required Lenders and Bank of America, N.A, as Administrative Agent.

3. Miscellaneous.

(a) The Credit Agreement, and the obligations of the Loan Parties thereunder and under the other Loan Documents, are hereby ratified and confirmed and shall remain in full force and effect according to their terms, as affected and amended by this Agreement.

(b) Upon the effectiveness of this Agreement, each reference in the Credit Agreement to “this Agreement,” “hereunder” or words of like import shall mean and be a reference to the Credit Agreement, as affected and amended by this Agreement.

(c) Each Guarantor (i) acknowledges and consents to all of the terms and conditions of this Agreement, (ii) affirms all of its obligations under the Loan Documents and (iii) agrees that this Agreement and all documents executed in connection herewith do not operate to reduce or discharge its obligations under the Credit Agreement or the other Loan Documents.

(d) The Borrowers and the Guarantors hereby represent and warrant as follows:

(i) Each Loan Party has taken all necessary corporate or other organizational action to authorize the execution, delivery and performance of this Agreement;

(ii) This Agreement has been duly executed and delivered by the Loan Parties and constitutes each of the Loan Parties’ legal, valid and binding obligations, enforceable against such Loan Party in accordance with its terms, except as such enforceability may be limited by (A) applicable Debtor Relief Laws and (B) general principles of equity (regardless of whether such enforceability is considered in a proceeding at law or in equity); and

(iii) No consent, approval, authorization or order of, or filing, registration or qualification with, any court or governmental authority or third party is required in connection with the execution, delivery or performance by any Loan Party of this Agreement.

(e) The Loan Parties represent and warrant to the Lenders that (i) the representations and warranties of the Loan Parties set forth in Article VI of the Credit Agreement and in each other Loan Document are true and correct in all material respects as of the date hereof with the same effect as if made on and as of the date hereof, except to the extent such representations and warranties expressly relate solely to an earlier date, in which case they shall be true and correct as of such earlier date, and (ii) no event has occurred and is continuing which constitutes a Default or an Event of Default

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(f) This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be an original, but all of which shall constitute one and the same instrument. Delivery of an executed counterpart of this Agreement by telecopy or digital/electronic transmission (e.g., PDF format) shall be effective as an original and shall constitute a representation that an executed original shall be delivered.

(g) THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE GOVERNED BY AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

[Signature pages follow]

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of the date first above written.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.

FIRST AMENDMENT TO FOURTH AMENDED

AND RESTATED CREDIT AGREEMENT

QUANTA SERVICES, INC.