Tetra Tech

Company Facts

Employees: More than 17,000
Revenue: $2.96 billion (FY 2018)
Corporate Office: 3475 East Foothill Blvd., Pasadena, CA 91107; +1 (626) 351-4664
Geographic Reach: 400 offices worldwide

Tetra Tech, Inc. was founded in 1966 to provide engineering services related to waterways, harbors, and coastal areas. For more than 50 years, the Company has substantially increased the size and scope of its business and expanded its service offerings through a series of strategic acquisitions and internal growth.

Today, Tetra Tech is a leading provider of consulting and engineering services.

From the beginning, Tetra Tech has attracted the best and brightest minds in science and engineering, and has always focused on bringing innovative solutions to our clients' most complex needs.

Today, Tetra Tech has more than 17,000 associates located in 400 offices worldwide.

Tetra Tech is a leading provider of consulting and engineering 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.

Tetra Tech’s innovative, sustainable solutions help our clients address their water, environment, infrastructure, resource management, energy, and international development challenges. We are proud to be home to leading technical experts in every sector and to use that expertise throughout the project life cycle.



Consulting and Technical Services

  • Management Consulting
  • Data Analytics
  • Emergency Management and Community Resilience
  • Laboratory Services
  • Training and Knowledge Transfer
  • Assessment and Planning
  • Information Technology Services
  • Modeling
  • Surveying and Mapping

Design and Engineering

  • Architecture
  • Civil Engineering
  • Mechanical, Electrical, and Plumbing
  • Arctic Engineering
  • Geotechnical Engineering
  • Structural Engineering

Program and Construction Management

  • Construction Management
  • EPC and Design-Build
  • Program Management
  • Construction Risk Management
  • Operations and Maintenance


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Contact Information


Contact Email

+1 (626) 351-4664

Contact Phone



3475 East Foothill Boulevard

Pasadena, US