The TSH Team
The Tsiouvaras Simmons Holderness staff of professionals provides the full range of design and construction services for transportation projects.
Bridge Design
The Tsiouvaras Simmons Holderness staff provides innovative and quality designs for highway bridges, pedestrian bridges, retaining walls, and drainage structures.
Highway/Interchange Design
Tsiouvaras Simmons Holderness provides the full range of highway and interchange engineering expertise on major freeway projects in Colorado.
Urban Streets
Tsiouvaras Simmons Holderness provides complete urban multi-modal transportation design solutions.
Traffic Engineering & Transportation Planning
Tsiouvaras Simmons Holderness provides transportation planning and analysis to help agencies shape the needs of their projects, including studies, intersection designs, and corridor and access planning.
Water Resources Engineering
Tsiouvaras Simmons Holderness offers complete services for water resources engineering including planning, design and construction support for public and private clients.
Construction Admin & Inspection
Tsiouvaras Simmons Holderness provides the full range of construction services including project management, contract administration, and field observation.
Design-Build
Tsiouvaras Simmons Holderness provides the full range of design-build services including design and construction services which include project management, design, construction quality assurance, and field observation.
Construction Management / General Contractor (CMGC)
Tsiouvaras Simmons Holderness has been a leader in the CMGC delivery method, including CDOT’s first highway CMGC project at I-70/Dotsero Interchange.
Owner Representative Design-Build
Tsiouvaras Simmons Holderness provides the full range of Owner Representative services for design-build projects. We have the experience to take a project from preliminary design, through procurement and construction.