High Quality Content by WIKIPEDIA articles! MasTec, Inc. (NYSE: MTZ) is an American multinational infrastructure engineering and construction company based in Coral Gables, Florida. The company`s activities include, but are not limited to, the engineering, building, installation, maintenance and upgrade of energy, utility and communications infrastructure, including electrical utility transmission and distribution, power generation, natural gas and petroleum pipelines, wireless, wireline and satellite communications, wind farms, solar farms and other renewable energy, industrial infrastructure and water and sewer systems. Its customers are primarily in the utility, communications and government industries. The Company`s core services are the engineering, building, installing, maintaining and upgrading of infrastructure for energy, communications, utility and government customers.