The company provides engineering, building, installation, maintenance and upgrade of energy, utility and communications infrastructure.

During the years of the Great Depression, the two established an office in West Palm Beach, Florida, and by 1936, had a small fleet of trucks and staff.

The company's first telecommunications projects were undertaken the following year at Cape Canaveral, where it was responsible for burying 85 miles of cable.

Projects then took on a greater geographical scope, as B&S established underground telecommunications systems and built radio towers in Costa Rica, Barbados, Trinidad-Tobago, and Venezuela.

When it overextended itself in Puerto Rico and could not build the telephone-infrastructure networks needed in Miami, the company's owner asked his friend, Cuban immigrant Jorge Mas Canosa, to help save the business.

Eager to improve the business, Mas Canosa climbed down into ditches, manholes, and trenches to observe workers’ construction methods.

BellSouth Telecommunications, Inc. awarded Church & Tower a long-term contract for projects in the greater Miami and Fort Lauderdale areas.

[6] On March 11, 1994, Church & Tower Group acquired 65 percent of the outstanding common stock of publicly traded Burnup & Sims, Inc.

[10] MasTec, Inc. earned total revenues of $3B in 2011[11] and, in addition to the MasTec brand, works under the following brand names: Wanzek, Power Partners, Precision Pipeline, Pumpco, nsoro, Advanced Technologies, ADVent, EC Source, Fabcor, Cam Communications, 3 PhaseLine, Optima Network Services, and Globetec.

[14] MasTec Power Corp. is another wholly owned subsidiary providing renewable energy Engineering, procurement, and construction management (EPC) services for a variety of fuel types.

They construct and maintain radio towers for mobile phone carriers, and do the trenching required to install fiber optic cable.

filed an application with the Federal Energy Regulatory Commission (FERC) on January 27, 2009, authorizing the construction and operation of the Ruby Pipeline Project.

Thirty-seven MasTec employees walked the 63 mile shoreline surrounding Foss Lake and removed eight large dumpsters of trash.