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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
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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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CMDP+ joint venture between Costain and MWH Treatment wins AMP8 framework with Southern Water

Upgrades will safeguard the environment, create jobs and add social value to the region.

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New Cornish dual carriageway open for traffic

Improving journey times and boosting economic growth.

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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.