Cotton, Shires and Associates, Inc. (CSA) provides a full range of engineering geologic and geotechnical engineering services.
Since 1974, our geologists and geotechnical engineers have applied advanced geotechnical analysis for a variety of clients throughout California and the Western United States. In addition to providing geotechnical engineering investigation and design services, CSA provides design, construction management, inspection, and litigation support services. We solve complex geotechnical challenges. Learn More »

Geotechnical Engineering & Geology Services

Landslides & Rock Mechanics Faults &
Seismic Hazards
Expert Witness Investigation
& Design
& Monitoring