Costain is a pioneering force in creating connected, sustainable infrastructure that enhances the quality of life and the environment, enabling both people and the planet to thrive. With a rich 160-year history of building essential infrastructure, Costain operates in the UK’s energy, water, transportation, defence, and nuclear markets. The company is dedicated to delivering innovative solutions that transform infrastructure performance, addressing the pressing challenges of climate change and environmental resilience.

Costain’s commitment to sustainability is evident through its decarbonisation and climate resilience strategy, which is driven by its climate change action plan. This includes achieving net zero emissions and promoting nature-based solutions with biodiversity net gain targets across all projects.

As an inclusive and family-friendly employer, Costain prioritises equity, diversity, and inclusion, ensuring a psychologically safe workplace for all employees. The organisation’s values—integrity, customer focus, safety and wellbeing, and environmental and social responsibility—guide its operations and support a culture of collaboration, curiosity, care, and courage.

Social responsibility is integral to Costain’s identity, with initiatives focused on community engagement, wellbeing, volunteering, and inclusion. This commitment is reflected in the organisation’s goal to improve a million lives by 2030.

Costain’s comprehensive benefits package, including a Group Pension Plan, income protection, life assurance, and private healthcare, underscores its dedication to employee wellbeing. Recognition programmes like the Costain Awards celebrate colleagues who embody the company's values, further fostering an environment of respect and inclusion.