Established in 1938, CTA specializes in engineering, interior design, land planning, historic preservation and facility management services. It also provides construction administration and building commissioning services, as well as information technology, communication, and roofing and envelope systems. The company has worked on various projects, including Harney Hospital, Prime Fitness, Green River High School, Sletten Regional Cancer Institute, First Interstate Bank, Avanta federal Credit Union and Glacier High School. It maintains offices in Texas, Idaho, Montana, Nebraska, Wyoming and Washington. CTA serves the financial, government, industrial, retail, commercial, health care and educational sectors. The company maintains one of its locations in Boise, Idaho.