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! 

Celebrating 50 Years of Excellence

Defining Our DNA—What Makes Tetra Tech Unique

Defining Our DNA—What Makes Tetra Tech Unique?

Celebrating our 50th Anniversary by sharing employee perspectives on what makes our company unique

Tetra Tech’s 50th Anniversary history booklet

Tetra Tech Releases 50th Anniversary History Booklet

Commemorating 50 years of leadership in engineering and consulting services


A Mexican member of the Caminos de Agua staff team prepares ceramic water filters.

Tetra Tech Announces 50th Anniversary Global Clean Water Fund Grant Recipients

Celebrating our anniversary by helping bring clean, safe water to communities around the world through EWB projects


Meet our Tetra Tech Family

Meet our Tetra Tech Family

Providing excellent service and smart solutions for projects around the world for the past 50 years

Tetra Tech: What’s in a name?

Tetra Tech: What’s in a name?

Celebrating our rich history by exploring how our founders came up with the name Tetra Tech

Throwback Thursday—Check Out Tetra Tech’s Historical Photos!

Throwback Thursday—Check Out Tetra Tech’s Historical Photos!

Celebrating our 50th anniversary by posting throwback photos every Thursday to showcase the work we’ve done over the years