Quanta Services to Present at Merrill Lynch Global E&C/Infrastructure Conference

HOUSTON, May 11 /PRNewswire-FirstCall/ -- Quanta Services, Inc. (NYSE: PWR) today announced that John Colson, Chief Executive Officer, and James Haddox, Chief Financial Officer, will present at the Merrill Lynch Global E&C/Infrastructure Conference being held May 15, 2007 at the Merrill Lynch Client & Conference Center in New York City.

Quanta Services' presentation will be webcast live on Tuesday, May 15, 2007, at 2:45 p.m. Eastern Time. To listen to the live audio webcast and view Quanta's presentation material, visit the Company's website at http://www.quantaservices.com under the "Events Calendar" in the Investor Center. A replay of the presentation will be archived on the website shortly after the presentation is concluded.

Quanta Services, Inc. is a leading provider of specialized contracting services, delivering end-to-end network solutions for the electric power, gas, telecommunications and cable television industries. The company's comprehensive services include designing, installing, repairing and maintaining network infrastructure nationwide.

    Contacts:  James Haddox, CFO      Ken Dennard / ksdennard@drg-e.com
               Reba Reid              Kip Rupp / krupp@drg-e.com
               Quanta Services Inc.   DRG&E
               713-629-7600           713-529-6600

SOURCE Quanta Services, Inc.

Released May 11, 2007