Our vision is to create connected, sustainable infrastructure enabling people and the planet to thrive.

We work to shape, create and deliver pioneering infrastructure solutions that transform the performance of the infrastructure ecosystem.

Transforming UK infrastructure performance and safeguarding our planet

We bring together a unique mix of engineering solutions for increasingly complex problems. Our commitment to creating connected, sustainable infrastructure is core to all our activities within our four strategic markets of transport, water, energy and defence.

There is a major requirement to update, connect and integrate infrastructure systems in the UK which requires new ways of working.

Our three pillars of growth 

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Our outstanding team is at the heart of everything we do and essential to the success of the business. Our unique mix of construction, consulting and digital experts embodies our core values and behaviours, which creates a culture where everyone feels included and respected.  

To deliver our ambition for growth, we’re focused on making Costain a great and inclusive place to work where people can be at their best. 

During 2023, we maintained our status as a 'A Very Good Company to Work For' (Best Companies), achieving a ranking of 19 in their 'Best Big Companies to Work For in the UK' category.  

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In 2023 we developed and implemented an ESG programme to accelerate our approach to enhance performance in this vital area, and at the same time we are working with our customers to support them in reaching their ESG goals.  

Going beyond protecting nature and the environment is crucial to our strategic priority of safeguarding our planet's future. Not only are we working with our customers to help decarbonise their businesses and improve their resilience, but we are also shaping solutions that deliver biodiversity net gain.  

We focus on maximising our social and environmental contribution. Every Costain construction contract has a local social value plan, targeting local opportunities to create sustainable outcomes such as increasing employment, improving access to community spaces and nature, and promoting local investment. 

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To meet the huge challenges and opportunities facing infrastructure in the UK, we need to transform the performance of infrastructure delivery.   

We collaborate more closely than ever with customers, partners, communities and wider industry to deliver infrastructure faster and more efficiently, without compromising on innovation, safety or environmental impact. In addition, our consultancy capabilities support our customers to develop strategies and deliver the outcomes they need. We’re also improving the performance of our business by simplifying processes and clarifying accountability.  

Find out more about our projects

Together we are creating connected, sustainable infrastructure to help people and the planet thrive.