Computapole Consolidated Power Project Crux Subsurface, Inc. Dacon Dashiell Corporation DNR Pressure Welding Ltd. EHV Power Groves Electrical Services Hargrave Power Intermountain Electric InfraSource Irby Construction JCR Construction Company Longfellow Drilling Services LUMA Energy M.J. Electric Mears Group North Houston Pole Line Northern Powerline Constructors, Inc. Northstar Northwest Lineman College NOVA PAR Electrical Contractors Phasor Engineering, Inc. Phoenix Power Group Potelco Probst Electric Quanta Energized Services Quanta Technology Quanta Telecommunication Services Quanta Utility Engineering Services Realtime Utility Engineers Ryan Company Service Electric Company Summit Line Construction Sumter Utilities TC Infrastructure Services The Aspen Utility Company The ComTran Group Underground Construction Company Utilimap Corporation Valard Construction Winco Powerline Services Quanta's North America Natural Gas Operating Units 1 Diamond Arnett & Burgess Pipelines Ltd. Banister Canadian Utility Construction Can-Fer Hallen Construction Company H.L. Chapman InfraSource Jet Tank Services Mears Group M.G. Dyess Microline North Houston Pole Line NorthStar Energy Services (Formerly Bradford Brothers, Inc. and Flint Construction Company) O.J. Pipelines PAR Electrical Contractors Performance Energy Services Price Gregory Quanta Marine Services LLC Q-Inline QPS Engineering RMS Welding Systems SpreadBoss T.G. Mercer Underground Construction Company Quanta's International Operating Units Quanta Power Solutions, Inda Quanta Services, Africa Quanta Services, Australia COE Drilling (AU) Consolidated Power Projects (AU) Enscope (AU) Mears Integrity (AU) Nacap (AU) NJ Construction (AU) Quanta Services, Latin America Quanta Services Philippines, Philippines References External links Companies listed on the New York Stock Exchange Companies based in Houston Construction and civil engineering companies of the United States Engineering companies of the United States Energy engineering and contractor companies American companies established in 1997 1998 initial public offerings