EC Source Services, LLC (ECS), along with its union affiliate T&D Power, was organized in 2006 and is a wholly owned subsidiary of MasTec, Inc. MasTec, Inc., a Nationally Certified Minority Company, is a publicly traded (NYSE – MTZ) specialty contractor that has successfully delivered some of the most complex large-scale infrastructure construction projects across the country. ECS is a construction solution provider, focused on transmission, substation, and distribution projects, including EPC services. Construction capabilities include delivery of overhead and underground transmission and distribution systems, substations, and switchyards.