Founded in 1977, Great Southwestern Construction, Inc. (Great Southwestern) started as a small general contractor performing high voltage utility work in Colorado, Arizona and New Mexico. Throughout the years, Great Southwestern developed a reputation as a leader in the high voltage construction industry. Today, Great Southwestern has grown to over 200 employees with the ability to perform high voltage construction and renewable energy construction in 26 western states. Areas of expertise include transmission line construction, substation construction, distribution construction and renewable energy projects.