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United States

Aerial view of a landfill gas beneficial-use project located among rolling hills

Tetra Tech’s presence in the United States has grown from a single office in Pasadena, California, in 1966 to a nationwide network of more than 300 offices.

We provide high-end, comprehensive engineering and consulting services for federal agencies, state and local governments, the military, and commercial clients throughout the United States and Puerto Rico.

With offices in every state, Tetra Tech brings local knowledge and technical expertise to every project. Whether an office houses 20 team members or 200, we maintain a broad and accessible presence to meet the unique needs of our clients. Our teams are at the forefront of innovation, spearheading some of Tetra Tech’s most advanced software and technology solutions to drive progress across the water, environment, and sustainable infrastructure sectors.

Our featured United States highlights

Purshotam Juriasingani pointing at a machine at a project site
  • Insights

Applying Ultrasound Technology for PFAS Destruction

  • By Purshotam Juriasingani
Cookies getting filled through automated conveyor belt system
  • Projects

Reducing Labor Costs for a Food Manufacturer by 24 Percent with a Digital Twin Simulation
Cleanroom for large scale production
  • Projects

Auditing and Designing Cleanroom Control Systems for Semiconductor Fabrication
Cardboard boxes move along a conveyor beneath automated packaging equipment in an industrial facility
  • Projects

Programming High-Speed Warehouse Distribution Controls
Aerial view of the Inner Harbor Navigation Canal–Lake Borgne Surge Barrier showing floodwalls, navigation gates, and storm surge protection infrastructure near New Orleans, Louisiana
  • Projects

Reducing Coastal Storm Risk Along Louisiana’s Inner Harbor Navigation Canal
A laboratory centrifuge spins white sample tubes in a bright lab
  • Projects

Integrating Centrifuge Controls into SCADA System for Pharmaceutical Production
Aerial view of a city skyline at dusk with illuminated buildings and streets
  • Projects

Strengthening SCADA Cybersecurity and Automated Reporting for the City of Fresno
A sunny coastal beach with waves, sand, and a scenic overlook
  • Projects

Templatizing SCADA Design for the Carlsbad Municipal Water District
Industrial battery storage units in outdoor electrical cabinets
  • Projects

Deploying Battery Energy Storage SCADA for Renewable Grid Resilience in Stanton
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