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Improving lives with evidence-based, sustainable development solutions

Tetra Tech is Leading with Science® to support climate change adaptation and mitigation around the world.

Tetra Tech is supporting our clients, the Ukrainian people, and neighboring countries in the recovery and reconstruction effort.

Tetra Tech leverages our global network of experts to meet the need for greater economic, social, gender, and environmental justice and equity.

Tetra Tech designs and delivers practical and impactful international development solutions in partnership with our clients, partners, and the communities we serve. We leverage decades of technical expertise from our teams across the globe to address today’s most complex social, economic, and environmental challenges and create positive impact for the future. Learn more.

40+

years of experience

100+

countries

250+

active projects

5,000+

international development employees

Our featured international development highlights

Municipal water department employees installing a new valve in Cape Town, South Africa

Mobilizing Finance to Increase Climate-Resilient Water and Sanitation Services

Pile of grain bags available for sale outside a store in Uganda

Improving Evidence-Based Decision-Making for Agriculture in Africa

A person speaking at a podium at Kosovo’s first-ever renewable energy auction, which competitively solicited 100 megawatts of solar energy

Enhancing Kosovo’s Energy Sustainability and Security

Headshot of Dr. Thais Bessa

Thais Bessa Discusses How Gender Equality and Social Inclusion Amplify Development Impact

Solar panels, pylon, and wind turbines in a field

Accelerating Decarbonization and Advancing Resilient, Inclusive Energy Sectors

A group of people in West Africa plant mangrove seedlings through a Tetra Tech-supported climate adaptation program

Advancing Equitable and Impactful Climate Adaptation

Two farmers prepare cacao samples to test quality

Delivering Land Titles to Households in Colombia 

Headshot of Ujjwal Pradhan

Ujjwal Pradhan Discusses the Role of Technology to Enhance Forest Management and Conservation in India

Screenshot of the WorkwithUSAID.org homepage

One Year In: Transforming Development through Partnership Tools

Explore our international development solutions

Our world-class engineers and scientists leverage industry-leading technical expertise, in-depth local knowledge, and sustainable approaches to provide resilient solutions for our clients.

Connect with us. Reach out to our international development experts.

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Our people around the world are supporting our mission and vision for a sustainable world. Join us today.

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