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

Today Tetra Tech is organized into two major business groups that align with our core markets and enhance the development of high-end consulting and technical solutions to meet our growing client demand. We provide clear solutions for projects in water, environment, renewable energy, sustainable infrastructure, and international development.

• Government Services Group (GSG) provides consulting and engineering services for a broad range of U.S. government clients (federal, state and provincial, and municipal) and all activities with development agencies worldwide.
• Commercial/International Group (CIG) provides consulting and engineering services worldwide for a broad range of commercial and international clients, inclusive of the commercial and government sectors.