Improving people's lives with smart infrastructure solutions

6 Agar Street, London, WC2N 4HN

Energy & Utilities Innovation Transaction Advisory

Costain helps to improve lives with smart infrastructure solutions across the UK’s energy, water, transportation and defence sectors

Glass Door
Team Size 500+
Established 1865
Gender Diversity 24% Female employees

Costain helps to improve lives with smart infrastructure solutions across the UK’s energy, water, transportation and defence sectors

We offer our clients leading edge solutions that are digitally optimised across the whole life cycle of their assets by integrating five core services.

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.

At Costain, we have a vibrant, challenging and growing business – an environment that provides tremendous opportunities for everybody. We're looking for skilled, expert and motivated people who'll help us to improve people's lives by deploying technology-based engineering solutions to meet urgent national needs across the UK’s energy, water and transportation infrastructures.

Our purpose is to improve people’s lives by delivering integrated leading edge smart infrastructure solutions to meet national needs across the UK’s energy, water, transportation and defence markets. Our work drives efficiency, safeguards the security, improves customer service and increases the capacity of the nation’s infrastructure. Our competitive advantage is the skills and experience of our team. To ensure that we continue to have the right skills and experience to meet these urgent national needs, during a period of accelerated innovation and increasingly complex requirements of our clients, we need to be more innovative and harness diverse thinking. We know that diverse teams are more pioneering and creative, as well as having a greater, combined understanding of clients, including the everyday users of infrastructure. Creating an inclusive culture makes a business more able to recruit, retain and progress a diverse workforce, increasing employee engagement and experiencing higher levels of wellbeing.

Founders & Leaders

Alex Vaughan BSc (Hons), FRICS, Dip IoD, FIoD Photo

Alex Vaughan BSc (Hons), FRICS, Dip IoD, FIoD

Chief Executive Officer

Alex Vaughan was appointed CEO in May 2019. Prior to this he was managing director of the Natural Resources division with responsibility for Costain’s services to water, oil and gas and power clients as well as the development of client facing technology solutions across the Group. He held this position since 2013. Alex is qualified as a chartered quantity surveyor. He has worked on infrastructure projects in the UK and internationally, as well as having held a number of corporate roles including Group HR director and corporate development director. In 2009 he completed the Harvard Business School Advanced Management Program (AMP). Chief Executive Officer

Dr Maxine Mayhew FioD, PhD Photo

Dr Maxine Mayhew FioD, PhD

Managing Director, Natural Resources

Maxine Mayhew was appointed managing director of the Natural Resources division in May 2019. She joined the business in 2017 and previously held the positions of water sector director and Group capability director, responsible for Costain’s capability including technology, consultancy, complex delivery and asset optimisation. After completing a PhD in wastewater treatment, Maxine has held a variety of roles in her 20 years in the water industry focused on leadership, innovation, commercial development and strategy delivery across all aspects of the industry from operations and engineering through to central support services and retail operations.

Helen Willis ACA, BSc Photo

Helen Willis ACA, BSc

Chief Financial Officer

Helen Willis was appointed chief financial officer in November 2020. She has significant experience in senior finance roles, including most recently as chief financial officer of De La Rue. Prior to this, Helen worked at Premier Farnell between 2014 and 2017, including as chief financial officer from 2015. She has also held senior finance roles at Pelican Rouge, AZ Electronic Materials, and HSS Hire.

David Taylor FRICS, FIoD Photo

David Taylor FRICS, FIoD

Group Commercial Director

David Taylor joined the Company in 2009 and was appointed Group commercial director in January 2015. He has held a number of senior leadership roles and is currently responsible for the commercial, supply chain and design management functions. Prior to joining Costain, David acquired more than 25 years’ experience with Taylor Woodrow where he held the position of commercial director for its UK operations.

Costain company film 2017
Our company film stars many Costain people and their families, who bravely volunteered to help share the purpose of our business, in improving lives with smart technological solutions.


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


  • ECI Project of the Year Award, European Construction Institute’s (ECI) annual Awards, 2016
  • RoSPA International Dilmun Environmental Award & Orders of Distinction Awards, Royal Society for the Prevention of Accidents (RoSPA) Health and Safety Awards, 2016
  • #8 Best Companies in Civil Engineering, New Civil Engineer 100 Companies of the Year Awards, 2016
  • Young Professional category, Offshore Achievement Awards, 2016
  • Orders of Distinction Awards, Royal Society for the Prevention of Accidents (RoSPA) Health and Safety Awards, 2015
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