Capabilities include the planning, design, installation, program management, maintenance and repair of most types of network infrastructure.

[6] After earning a degree in geology from the University of Missouri at Kansas City, Colson entered the military and served one year in Vietnam.

After becoming executive vice-president and general manager in the early 1980s, he bought the company and became the president in 1991, and ultimately emerged as its owner.

[7] In addition to PAR, Quanta consisted of Union Power Construction Co., Trans Tech Electric Inc., and Potelco Inc. With BT Alex Brown Incorporated, BancAmerica Robertson Stephens, and Sanders Morris Mundy Inc. serving as underwriters, Quanta completed its IPO in February 1998, raising $45 million.

A month later Quanta adopted a "poison pill" plan to prevent a takeover, prompting UtiliCorp to sue.

On August 4, 2015, Quanta Services sold its fiber optic licensing operations (Sunesys) to Crown Castle International Corp. (NYSE: CCI) for approximately $1 billion in cash.

[13] In September 2009, Quanta Services announced that a deal had been struck to acquire Price Gregory, the largest U.S. gas pipeline construction company, for $350 million.

On October 22, 2010, Quanta Services announced an agreement to acquire Canada's largest electric power line contractor, Valard Construction, for approximately $219 million.

Blattner generated full-year 2020 revenues and adjusted EBITDA (a non-GAAP measure) of approximately $2.4 billion and $291 million, respectively.

[16] In August 2022, Quanta purchased William E. Groves Construction Inc. of Madison, KY.[17] On March 14, 2016, Earl C. “Duke” Austin succeeded former chief executive officer Jim O’Neil.

The 240 mile project was possible because of Quanta Energized Services (QES) live-line planning capabilities and North Houston Pole Line's construction expertise.