is a consulting engineering firm offering geotechnical, materials, environmental, and structural engineering services, construction observation, soil and materials testing, and forensic engineering. We provide these services throughout the Rocky Mountain Region and beyond. The result of the 1977 merger of Robert W. Thompson, Inc., established in 1971, and Commercial Testing Laboratories, establish
ed in 1947, the company has grown in capabilities and staff to support client needs since the merger. We now have offices in six cities in Colorado and one in Wyoming and Montana. The largest employee-owned geotechnical engineering firm headquartered in Denver, CTL | Thompson’s experienced specialists provide engineering consulting services for clients, expert testimonials at trials, and share their knowledge with peers at trade and professional organizations. has about 250 full-time employees with seasonal variations. Approximately 160 of these individuals are professional or technical. Our staff includes Geotechnical, Materials, Environmental and Structural Engineers, Engineering Geologists, and certified environmental professionals.
