AMEND.NO.1 TO EMPLOYMENT AGREEMENT-JOHN R. COLSON

Exhibit 10.42


AMENDMENT NO. 1
TO EMPLOYMENT AGREEMENT

THIS AMENDMENT NO. 1 to Employment Agreement dated March 13, 2002, by
and between Quanta Services, Inc., a Delaware corporation, and its affiliates
(collectively "Employer"), and John R. Colson ("Employee"), is hereby entered
into this 1st day of June, 2002.

WHEREAS, Employer and Employee entered into an Employment Agreement on
March 13, 2002 (the "Employment Agreement"); and

WHEREAS, Employer and Employee desire to amend the terms of the
Employment Agreement;

NOW, THEREFORE, Employer and Employee agree as follows:

1. Section 5(c) of the Employment Agreement is amended to remove the
following language:

Anything in this Agreement to the contrary notwithstanding, a
termination by the Employee for any reason during the 30-day
period immediately following the six-month anniversary of the
Effective Date shall be deemed to be a termination for Good
Reason for all purposes of this Agreement.

2. Any provisions of the Employment Agreement not specifically amended
herein shall remain in full force and effect.

IN WITNESS WHEREOF, the parties hereto set their hand the day and year
first above written.

EMPLOYER: EMPLOYEE:
QUANTA SERVICES, INC. JOHN R. COLSON


By: /s/ PETER T. DAMERIS By: /s/ JOHN R. COLSON
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Peter T. Dameris, COO John R. Colson