Welcome to EC Source, a MasTec Company. NYSE: MTZ

EC Source (ECS), together with its subsidiary construction related professional service providers, is a nationally recognized full-service EPC program management entity focused on financing and deploying Extra High Voltage (EHV) electrical systems in North America.  ECS is staffed with recognized industry leaders in project planning and execution of large-scale electric transmission projects, including full service environmental planning, engineering, procurement, and construction activities.

ECS is engineering led and construction focused, specializing in large fixed price, competitively bid EHV transmission line and substation projects, guaranteeing quality, performance, and schedule.  ECS is headquartered in Mesa, Arizona with offices in Arizona, Nevada, Texas, Wyoming, Utah and Iowa.

ECS Headquarters - Mesa, AZ



At ECS we pride ourselves on our commitment to safety and a safe work environment.