Costain improves people’s lives by creating connected, sustainable infrastructure that enables people and the planet to thrive. Through the delivery of predictable, best-in-class solutions across the transport, water, energy and defence markets, we are creating a sustainable future and securing a more prosperous, resilient and decarbonised UK.

By bringing together our unique mix of construction, consultancy, engineering and digital services, we work strategically with our customers and suppliers to meet critical national needs​. Together, our people transform the performance of the infrastructure that connects, protects and powers people's lives.

Everything we do is rooted in delivery and organised around our customers, anticipating and solving their challenges across the infrastructure ecosystem. Our 160-year heritage of pioneering problem-solving, together with constant innovation, enables us to deliver cleaner, more efficient solutions that will drive opportunities and growth for our country and our customers.