Costain

We work with our customers to support the strategic defence capabilities and energy resilience operations that protect and power the UK, its people, values, and interests

Across defence, we support the UK’s most strategic systems and the service personnel that use infrastructure to live, work and train for operations. In nuclear energy, we ensure long-term, low carbon energy security. 

Both the defence and nuclear energy markets are highly complex and sensitive, requiring specialist understanding, experience and expertise. 

As an integrated delivery partner, we deliver value for money, reduce complexity and provide certainty and success across our customers’ projects, programmes and large portfolios to maximise through-life operational value. 

We are one of the largest providers of project and engineering services to the UK nuclear market and have been involved with some of the UK’s largest nuclear construction projects.