Tetra Tech is working in more than 50 countries in every major region of the world, providing state-of-the-art technology and institutional solutions to address our customers’ most complex water, environmental, energy, infrastructure, and resource management challenges. With 450 offices worldwide and a network of more than 20,000 staff, we offer the power of a multibillion dollar company with the speed of a 20-person office.


Fragile political environments, volatile labor markets, and economic and regulatory uncertainty are just a few of the challenges of working in Africa. Tetra Tech’s long and diverse work history across the continent assures our clients of a strong partner with unique insight to provide stable operations and successful project delivery.


For more than 20 years, Tetra Tech has provided premier consulting engineering and technical services to support sustainable development throughout Asia. We offer comprehensive services for public-sector and commercial clients throughout Asia from our offices in China, India, Indonesia, Japan, South Korea, Philippines, and Thailand.

Australia and New Zealand

Leading with Science® to deliver innovative consulting and engineering services across Australia and New Zealand


With almost 50 years of experience in the provinces and territories, Tetra Tech has unique capabilities in Canada’s water, environmental, energy, infrastructure, mining, and industrial sectors. Our innovations and specialized services span major cities such as Vancouver and Montreal, as well as the remote and extreme environments of the Yukon and Northern Territories.


As pioneers in engineering, sciences, and construction consulting services in the circumpolar region, Tetra Tech has a proven reputation for successful development in arctic conditions. Tetra Tech maintains strong relationships, local presence, and aboriginal partnerships in northern Canada and Alaska to support our public and commercial clients.

Europe and Eurasia

Tetra Tech provides full-service engineering and environmental consulting services throughout Europe, from Italy’s Mediterranean coast to Greenland’s arctic.

Latin America and Caribbean

For more than 25 years, Tetra Tech has been actively engaged in diverse government and commercial projects in the Latin American and Caribbean region. Our work includes the water and sanitation, agriculture and economic growth, environment and sustainability services, energy, and mining sectors.

Middle East

Tetra Tech has provided development technical assistance, planning, and engineering support in some of the Middle East’s most austere environments for more than 40 years. Our international experts have a profound understanding of the region, along with an impressive track record of program management and project delivery on behalf of government and commercial clients.

United States

Founded in Pasadena, California, in 1966, Tetra Tech has grown its presence in the United States to more than 250 offices throughout the country. We support our federal, state, municipal, and private sector clients with full planning and engineering services in the water, environment, infrastructure, resource management, and energy sectors.