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                                                                   EXHIBIT 23.7
 
                         CONSENT OF PROPOSED DIRECTOR
 
  The undersigned hereby consents to being named as a proposed member of the
Board of Directors of Quanta Services, Inc. (the "Registrant") in the
Prospectus constituting a part of the Registration Statement on Form S-1 of
the Registrant filed under the Securities Act of 1933, as amended.
 
                                                    /s/ Gary A. Tucci
                                          _____________________________________
                                                      Gary A. Tucci
 
December 18, 1997
