Tsiouvaras Simmons Holderness (TSH) is a Colorado based firm that serves the Colorado Transportation Industry. The TSH team has the experience and emphasized expertise in project management, public involvement, bridge, roadway, drainage, utility design, and construction management. Our projects have included significant public process and environmental clearance efforts. We are knowledgeable with CDOT procedures and standards having the distinct ability to complete projects on time and within budget. We have successfully completed many challenging projects. These projects reflect our commitment to providing top quality engineering services from preliminary design to final construction and the ribbon cutting ceremony.