We use cookies to help improve your online experience. If you continue to use our website, we will assume that you’re happy with this.
Learn more about cookies and how to change your settings in our Privacy and cookies policy.

Our purpose

Our purpose is to improve people's lives by deploying technology-based solutions to meet urgent national needs across the UK's energy, water and transportation infrastructures.

Engineering tomorrow

Costain helps to improve lives with smart infrastructure solutions across the UK’s energy, water and transportation infrastructures.  We help to safeguard the security, increase the capacity, improve customer service and drive efficiency in our clients’ infrastructure programmes.  Our strategy is to become the UK’s leading smart infrastructure solutions company through our focus on blue chip clients whose major spending plans are underpinned by strategic national needs, regulatory commitments or essential maintenance requirements. We offer a broad range of innovative services across the whole life cycle of our clients’ assets by integrating complex delivery, consultancy, technology and asset optimisation services.  Our culture and values underpin everything we do.

Our strategy

Our Engineering Tomorrow strategy is about identifying, developing and implementing innovative solutions to meet the UK’s major infrastructure needs.

Our strategic focus is to enhance our growth and strengthen our market position by providing innovative, sustainable solutions to meet increasingly complex and large-scale national needs. Our strategy will ensure we remain competitive and continue to deliver shareholder value for years to come.

Our services

  • Consultancy (advisory, design, programme management)
  • Complex delivery
  • Technology
  • Asset optimisation.

Clear set of priorities

We are committed to meeting our clients' needs.  As a result, our four key priorities are:

  • Work responsibly and safely
  • Broaden our integrated service delivery
  • Attract and develop new skills
  • Achieve sustainable growth in profit.



The sectors in which we work


We deliver end-to-end asset lifecycle solutions across the entire railway, from major station projects to multi-disciplinary rail projects.


We are a leading provider of end-to-end highway services, delivering technology-led solutions for our clients.


We play a significant role in safely delivering the energy infrastructure that will satisfy the UK’s future needs.

Oil & Gas

We are a leading provider of full life-cycle engineering services in the development, design delivery and maintenance of oil and gas infrastructure.


We are a leading provider of engineering solutions to UK water utility companies across the asset lifecycle.


With over 30 years' experience, we offer leading engineering solutions to the nuclear and defence industries.

How we work

We are committed to operating our business both sustainably and responsibly. We are focused on one simple but powerful message – ‘Costain Cares’. This is not a slogan: it is an attitude of mind. It is integral to everything we do and a touchstone against which we can evaluate and measure our performance. We care about all our stakeholders.

Our values

Everyone at Costain is committed to being:

  • Customer focused
  • Open and honest
  • Safe and environmentally aware
  • Team players
  • Accountable
  • Innovative – improving continuously and therefore the...
  • Natural choice.


Investment case

What we do