Tetra Tech

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Tetra Tech logo
3475 East Foothill Boulevard
Pasadena, CA
United States
(626) 351-4664
(626) 351-5291

Tetra Tech is a leading provider of consulting, engineering, and technical services worldwide. We are a diverse company, including individuals with expertise in science, research, engineering, construction, and information technology. Our strength is in collectively providing integrated services—delivering the best solutions to meet our clients' needs.


In a complex world with competing demands for limited resources, Tetra Tech offers clear solutions made possible with sound science, understanding, innovation, and industry-leading approaches.


In keeping with our full-service reputation and client-focused approach, Tetra Tech provides the full range of services to the transportation sector.  Whether the project is a residential street improvement, a major interchange, an environmental assessment, corridor study, or major structural design, our professional, experienced staff will provide support services from conception to study, through design and construction.


Tetra Tech combines large-company resources with regional knowledge and expertise in the areas of planning, permitting, design, construction administration, and program management consulting for highways, structures, transit systems, and aviation facilities.


Our regional approach and consistent delivery has resulted in the majority of our work being repeat work with longstanding clients. We are proud of our record and recognize that our success depends on meeting or exceeding our client’s expectations for delivery, innovation, quality, and service.



  • Transportation planning

  • Traffic studies

  • Environmental permitting/environmental studies

  • Highway and roadway design

  • Bridges and retaining structures

  • Noise barriers

  • Traffic signals/intersection design

  • Intelligent transportation systems

  • Transit studies

  • Transit facility design

  • Stormwater design

  • Survey/Geographic Information System (GIS)/remote sensing

  • Right-of-way engineering

  • Program management

  • Construction management


Company Facts

Employees: 13,000

Revenue: $2.6 billion (FY 2011)


Corporate Office: 3475 East Foothill Blvd., Pasadena, CA 91107; (626) 351-4664

Geographic reach: 330 offices worldwide

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