Costain helps to improve people’s lives by creating connected, sustainable infrastructure that enables people and the planet to thrive. We shape, create, and deliver pioneering solutions that transform the performance of the infrastructure ecosystem across the UK’s energy, water, transportation, and defence & nuclear markets. We engineer and deliver sustainable, efficient, and practical solutions by bringing together our unique mix of construction, consulting, and digital experts. In defence and nuclear, we deliver critical national infrastructure combining our civil and defence nuclear experience, ensuring long-term energy security and a sustained UK deterrent programme.