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Together we shape, create, deliver

Our purpose is to improve people’s lives by creating connected, sustainable infrastructure that enables people and the planet to thrive.

About us
Kielder Reservoir Credit Northumbrian Water Small

AI-powered data analytics platform

First-of-a-kind solution could release more than £10m of savings for Northumbrian Water

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Costain obtains London Stock Exchange’s Green Economy Mark

Supporting the green economy across the infrastructure ecosystem

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Carbon tracker standardises emissions reporting

Environmental data reporting is critical to making net zero a reality

Costain carbon tracker
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Costain given green light for transformational hydrogen network

Multimillion-pound FEED project will enable new hydrogen distribution network in Teesside.

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Together
we deliver

Explore our sectors
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Our commitment to create connected, sustainable infrastructure is core to all our activities across our six sectors: Road, Rail, Integrated Transport, Energy, Water and Defence & Nuclear Energy.

Together
we solve

Explore our services
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As construction, consulting and digital partners we bring together a mix of experts to engineer solutions to the most complex infrastructure problems. We anticipate and solve our customers’ challenges, helping them deliver their strategies and progress their business plans.  

Together
we succeed

Careers at Costain
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We're looking for curious, collaborative and courageous people who'll help transform the performance of infrastructure. Whether you’re an experienced professional looking for a new challenge, or entering the workplace for the first time, we can offer you the very best opportunities and support for your career. 

We’re committed to building a long–term sustainable company that creates economic, environmental and social value for our stakeholders. Our ESG performance is the responsibility of every individual in our organisation.