International Development

Tetra Tech is a global leader in international development, offering end-to-end technical support and advisory services that improve lives and promote resilient, inclusive growth. Our multidisciplinary teams apply local knowledge and global insight to design and deliver practical, measurable results across a range of development sectors.

From gender equality and climate resilience to economic reform and governance, we work alongside clients and communities to co-create solutions that address complex challenges and strengthen institutional capacity. Our expertise spans fragile, conflict-affected, and rapidly changing environments, where innovation, evidence, and trusted partnerships are critical to success. Learn more about our international development work for UK and European clients.

Governance and Institutional Strengthening

We support governments and civil society to improve transparency, accountability, and service delivery by strengthening institutions and systems.

• Public financial management and policy reform
• Anti-corruption strategies and integrity systems
• Local governance and decentralisation
• Civil society engagement and capacity building

Climate Change and Nature

Our integrated environmental services help countries build resilience, manage natural resources sustainably, and implement climate mitigation and adaptation strategies.

• Climate vulnerability and risk assessments
• National adaptation planning and implementation
• Nature-based solutions and ecosystem protection
• Environmental governance and institutional support

Economic Growth and Livelihoods

Tetra Tech’s economic growth team promotes inclusive, sustainable economic development by enhancing market systems, creating jobs, and supporting small businesses.

• Value chain and market systems development
• SME support and access to finance
• Labour market analysis and skills development
• Trade and investment facilitation

Fragility, Conflict, and Security

Our team addresses root causes of conflict and insecurity, helping communities recover, stabilise, and rebuild with resilience.

• Peacebuilding and conflict transformation
• Security sector reform and community policing
• Social cohesion and trauma support programmes
• Countering violent extremism initiatives

Evaluation and Research

Our evaluation and research practice generates robust and reliable evidence and insights that help international development clients to understand what works for programmes, learn lessons and identify areas of adaptation and improvement. We are a leading provider of evaluation and research services and specialist advice to the European institutions and bodies, international organisations, and donors.

• Third party monitoring (TPM)
• Independent impact evaluations
• Large-scale research and knowledge management
• Impact assessment and capacity building