About TSH

Tsiouvaras Simmons Holderness (TSH) is a Colorado-based firm founded in 2005 to serve the Colorado Transportation Industry. TSH currently has nearly 80 employees who work exclusively in Colorado on transportation projects.  TSH has offices located in the Denver Tech Center, downtown Colorado Springs and Loveland providing bridge, highway, traffic and hydraulic design along with construction management services. Since our inception in 2005, TSH has earned a reputation as a leader in the industry resulting from the successful completion of many complex projects. Our approach is to provide responsive, innovative, and high-quality services coupled with a commitment from our firm leadership and associates to produce projects that meet a high standard and that will serve the best interest of the public. Our clients include the Colorado Department of Transportation, local cities, counties, municipal districts, transit agencies and airports. Our employees are our most valuable asset and provide diversity as a team to make client satisfaction the firm’s top priority.