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Emerging national security threats require robust and innovative solutions to prevent them. Tetra Tech’s defence consultants implement technical solutions to enhance operational capability, security, and performance.

Our defence consultants have supported the UK’s armed forces in delivering some of the Ministry of Defence’s largest and most complex projects and programmes. We provide expertise across a diverse range of building and infrastructure projects, utilising over 700 Suitably Qualified and Experienced People (SQEP) in the UK with security clearance.

Tetra Tech is backed by global reach and innovations in data analytics, defence information technology, munitions response, training, policy, and assessment, monitoring, and evaluation.


As a Tier 1 Strategic Supplier to the Defence Infrastructure Organisation (DIO), we provide project management and multidisciplinary design services for developing and optimising the defence estate.

Global Reach

Tetra Tech works on UK and allied military estates around the world. We have worked alongside 170 Engineer Group on Op HERRICK in Afghanistan and continue to deploy experts into theatres and training estates under our industry-leading Duty of Care platform.

Security and IT

Our accredited IT systems enable us to work on classified projects and engage securely with our clients, providing confidence in the management and security of data and efficiency in delivery.

Award Winning

Our high-quality performance has won us and our clients multiple awards with the Association for Project Management, the Institute for Collaborative Working, Royal Institute for Town Planning, and MOD Sanctuary (environmental) awards.

Armed Forces Community

As an Employer Recognition Scheme Gold Award holder, we employ veterans and military spouses, recognising the significant value military experience, leadership, and teamwork brings to our organisation and our projects.

We are committed to supporting the armed forces community and developed robust Armed Forces Pathway to help support former Armed forces people progress their careers with us.

Leveraging global resources

We are part of Tetra Tech’s global defence services team and we leverage more than 50 years’ experience providing context-appropriate solutions, designing sustainable infrastructure, and protecting and restoring the environment. Learn more about our defence services.

Connect with us. Reach out to our experts.

Our featured defence highlights

Dark blue background with digital elements overlaid and text that reads Sponsor of The UK’s Leading Defence Procurement and Supply Chain Event, 29 March 2023, Exhibition & Conference Centre

We are going to DPRTE 2023

Headshot of Glyn Utting

Glyn Utting – from graduate to Defence Portfolio Lead

Scotland’s green coastline from above, sandy beach to right and blue skies in distance

Managing the RAF’s Lossiemouth Development Programme

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