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

• Jviation
• Shea Properties
• Shea Homes