About Us
Leading with Science® to solve the world’s most complex problems
Tetra Tech is a leading, global provider of high-end consulting and engineering services. We are 28,000 employees dedicated to solving water, environment, sustainable infrastructure, renewable energy, and international development challenges for our clients and communities.
We use our Leading with Science® approach and leverage our Tetra Tech Delta technologies to create sustainable solutions for 100,000 projects in more than 100 countries on 7 continents each year.
$5B
revenue
100,000
projects
28,000
employees
100+
countries
550
offices
Who we are
Tetra Tech has been Leading with Science® to address our clients’ most complex challenges since 1966.
Our approach
Safety and sustainability are at the heart of our business. We improve the quality of life for people across the globe.
What we do
Learn how we solve our clients’ problems with practical, innovative, sustainable solutions.
Where we work
With 550 offices worldwide, we combine local understanding with the resources and expertise for the most demanding projects.
Engineering News-Record #1 Rankings
#1
in Water Treatment/Desalination
#1
in Environmental Management
#1
in Wind Power
#1
in Hydro Plants
Recognition
- 2024: Climate Change Business Journal (CCBJ) and Environmental Business Journal (EBJ) awards for outstanding business and advancing climate resilience, innovation, and diversity and inclusion. Read more.
- 2024: Barron’s 100 Most Sustainable U.S. Companies – advanced to #8 from #24.
- 2023: Investor’s Business Daily 2023 Best ESG Companies special report #1 ranking for Human Capital and #2 ranking for Environment.
- 2023: CCBJ and EBJ awards for outstanding business and achievement in renewable energy, forest conservation, ocean monitoring, and dam safety. Read more.
- 2023: Tetra Tech is honored to be selected for the 2023 Society of American Military Engineers JW Morris Large Business Award.
- 2022: U.S. Small Business Administration Dwight D. Eisenhower Award, Excellence in Service Category. Read more.
- 2021: Society of American Military Engineers Large Business Award for achievement in small business mentorship. Read more.
- 2021: Newsweek’s list of America’s Most Responsible Companies 2021: Top 10 companies in the Professional Services category. Read more.
