Overview MasTec Utility Services delivers critical infrastructure construction and engineering services for power delivery, gas, and water customers, specializing in overhead and underground electric distribution for power delivery systems, gas distribution construction for gas systems, and turnkey solutions for a variety of water, sewer, and civil infrastructure projects. Provide for connecting and disconnecting, installing and removal, moving and transferring of various electrical devices on customer facilities, i.e. transformers, transformer banks, regulators, switches, switching devices, capacitor banks, etc.