Tsiouvaras Simmons Holderness has been a leader in the implementation of CMGC, a relatively new project delivery method in the Colorado transportation industry. TSH has provided design services for various agencies, including CDOT, local municipalities, and Denver International Airport. As the prime consultant, we work closely with the owner, prime contractor, and the rest of the project team to maximize project innovation while mitigating the risk for all parties. Since 2009, TSH has worked on many CMGC projects, including the I-70/Dotsero interchange, the first CMGC transportation project administered by CDOT.


  • Experienced Prime Consultant on CMGC Projects including CDOT’s first Transportation CMGC project
  • Full Range of Design Services Including Roadway, Highway, Bridge, Drainage, Traffic, and Utilities
  • Integrated partner in developing best value
  • Innovative Concepts to Maximize Project Team Success
  • Active participant in mitigating project risks and leveraging opportunities
  • Staffing and organization to maximize schedules