Senior Technical Assurance Engineer

Join Thames Water’s Major Projects Team – Shape the Future of Water and Wastewater Infrastructure.

Are you ready to take on one of the most exciting engineering challenges in the UK water sector?

We’re looking for a Senior Technical Assurance Engineer to join our Major Projects team, where you’ll play a pivotal role in delivering some of the most technically complex and high-profile projects in the UK’s largest potable water and wastewater treatment investment programmes.

With project values ranging from £30 million to over £200 million and covering the full delivery lifecycle from feasibility to asset takeover, this is your opportunity to make a real and lasting impact—on our customers, our environment, and the future of water and wastewater infrastructure.

What you’ll be doing as a Senior Technical Assurance Engineer

  • Lead technical assurance across capital projects, ensuring delivery to time, cost, and quality.
  • Contribute your skills and experience to positively shaping solutions that holistically balance innovation, value for money, risks, resilience and safety.
  • Collaborate with contractors and consultants to ensure compliance with our technical, environmental, and regulatory standards.
  • Ensure solutions meet the Project Brief, address stakeholder Needs and deliver best Whole Life Cost. buildable, operable and maintainable solutions.
  • Ensuring consultants and contractors fulfil their CDM role such as Principal Designer, Designer and Principal Contractor duties.
  • Provide the necessary Health and Safety information to the supply chain in accordance with CDM Regulations.
  • Support the Project Manager to achieve governance on solution endorsement from internal stakeholders such as Engineering, Operations and Sponsor.
  • Take on the lead to ensure all technical queries are responded to time.
  • Assuring contractors and consultants provide the necessary evidence to demonstrate compliance with technical and construction requirements.
  • Carry out technical audits / assessments (pre, during and post-construction) to ensure Environmental, Health and Safety and Quality issues are appropriately addressed on your projects.
  • Ensure change is managed effectively to minimise cost and programme impacts and mitigate the risks to compliance, performance, health, safety, wellbeing or the environment.
  • You will proactively protect and enhance Thames Water’s reputation with external customers and stakeholders.
  • You’ll also enjoy an environment that encourages continuous improvement, customer-focussed and collaborative culture across a range of technical and commercial disciplines, internal business functions, and with the supply community amongst a diverse range of external stakeholders.

Hybrid – Contract based in Riverside STW with travel to other sites. The successful candidate will be required to be on-site for at least 3 days a week. 36 hours a week, Monday to Friday.

What you should bring to the role

  • Hold a degree in civil/mechanical/process Engineering or possess equivalent experience in a relevant role within the water or wastewater sector. We also welcome candidates with transferable skills from other industries who bring strong technical expertise and a passion for engineering excellence.
  • Have significant experience working in a technical or similar role with knowledge and previous involvement in delivering major complex projects across the project life cycle.
  • Motivated in the effective communication of complex issues to simple messages to enable management decision that delivers Thames Water Needs, protect people, the environment and creating better outcomes for customers.
  • Have detailed technical knowledge within your discipline plus experience of working across engineering disciplines and interfaces with other projects within the same site.
  • Be commercially aware with a good practical understanding of engineering contracts.
  • Have a desire to adopt and demonstrate behaviours aligned with Thames Water’s Values.
  • Be resilient, tenacious under pressure and highly motivated to successfully deliver projects safely to time, cost and quality.

What’s in it for you?

  • Competitive salary between £50,000 to £65,000 per annum, depending on the skills and experience of successful candidates.
  • 26 days holiday per year, increasing to 30 with the length of service (Plus bank holidays)
  • Contributory pension – Defined Contribution - Maximum of 12% -2x employee contribution
  • Personal Medical Assessments – Open to all once a year
  • Performance-related pay plan directly linked to company performance measures and targets
  • Wider benefits scheme including our benefits hub, which is packed full of offers and information to save you money and support your wellbeing.

Find out more about our benefits and perks (Please note different T&Cs apply if on secondment)

Who are we?

We’re the UK’s largest water and wastewater company, with more than 16 million customers relying on us every day to supply water for their taps and toilets. We want to build a better future for all, helping our customers, communities, people, and the planet to thrive. It’s a big job and we’ve got a long way to go, so we need help from passionate and skilled people, committed to making a difference and getting us to where we want to be in the years and decades to come.

Learn more about our purpose and values

Working at Thames Water

Thames Water is a unique, rewarding, and diverse place to work, where every day you can make a difference, yet no day is the same. As part of our family, you’ll enjoy meaningful career opportunities, flexible working arrangements and excellent benefits.

If you’re looking for a sustainable and successful career where you can make a daily difference to millions of people’s lives while helping to protect the world of water for future generations, we’ll be here to support you every step of the way. Together, we can build a better future for our customers, our region, and our planet.

Real purpose, real support, real opportunities. Come and join the Thames Water family. Why choose us? Learn more.

We’re committed to being a great, diverse, and inclusive place to work. We welcome applications from everyone and want to ensure you feel supported throughout the recruitment process. If you need any adjustments, whether that’s extra time, accessible formats, or anything else just let us know, we’re here to help and support.

When a crisis happens, we all rally around to support our customers. As part of Team Thames, you’ll have the opportunity to sign up to support our customers on the frontline as an ambassador. Full training will be given for what is undoubtedly an incredibly rewarding experience. It’s also a great opportunity to learn more about our business and meet colleagues.

Disclaimer: due to the high volume of applications we receive, we may close the advert earlier than the advertised date, so we encourage you to apply as soon as possible to avoid disappointment.