CTL | Thompson has been providing services in Denver since 1971. There are over 120 employees at the 1971 West 12th Avenue location including almost 20 engineers, 3 geologists and over 80 engineering technicians.

Denver, Colorado


1971 West 12th Avenue

Denver, Colorado 80204

Tel: 303.825.0777

Fax: 303.825.4252

The Denver office offers a wide range of geotechnical and geologic expertise during preliminary studies, design level investigations and forensic evaluations. The professional staff are supported by technicians and inspectors with a range of specialties to staff construction projects. 


We also offer a streamlined approach to construction observation and testing. Our field representatives are certified by, and members of the following organizations - the National Institute for Certification Engineering Technologies (NICET), the American Concrete Institute (ACI), the International Conference of Building Officials (ICBO), the American Welding Society (AWS), and the American Society for Nondestructive Testing (ASNT). Our staff can promptly identify problems and work with the project team to provide alternative solutions.  With multiple areas of competency, we provide our clients a single source for construction observation and material testing services.


Our environmental staff includes engineers, industrial hygienists, and environmental scientists with relevant project experience, certifications, and availability to meet technical needs and Client requirements. CTL has conducted investigations for a wide range of contaminants in both urban and remote sites.