Tsiouvaras Simmons Holderness has provided engineering services in both the public and private sectors. Below is a representative list of our clients:
Public Agencies
- CDOT
- City and County of Denver
- City of Boulder
- City of Golden
- City of Louisville
- Douglas County
- Town of Castle Rock
- Town of Parker
- University of Colorado
Construction Contractors
- CEI (formerly Concrete Express)
- Edward Kraemer and Sons
- Lawrence Construction Company
Private Companies