Tetra Tech was founded in 1966 to provide innovative solutions in the areas of coastal engineering, research and development, geophysics, and systems analysis. Join us as we celebrate our 50th anniversary with unique looks at the company’s history, what makes up Tetra Tech’s DNA—as explained by our employees, and much more. 

Over the past 50 years, Tetra Tech has grown into a leading consulting and engineering firm that provides full lifecycle support in the water, environment, infrastructure, resource management, energy, and international development sectors. Our Tetra Tech family has grown from 30 people based in Pasadena, California, to 16,000 associates in 400 offices around the world.

While the company’s services and operations have expanded, our underlying principles have remained constant. We are proud to celebrate our 50-year milestone with our employees, clients, and partners—and look forward to the next 50 years!