Senior Technical Assurance Engineer

Job title Senior Technical Assurance Engineer  Division Asset Operations & Capital Delivery Location Hybrid - Clearwater Court - RG1 8DB
Contract type Permanent Full/Part-time Full-time or part-time Salary Competitive salary from £55,000 to £65,000 per annum, depending on skills and experience Job grade B Closing date 20/01/2026

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 ICA 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 £120 million
, and covering the full lifecycle from feasibility to handover, this is your opportunity to make a real and lasting impact
—on our customers, our environment, and the future of water 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.
• Champion a strong health, safety, and wellbeing culture
  , supporting Thames Water’s ‘Triple Zero’ vision.
• 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.

Hybrid – Clearwater Court with travel to other sites. The successful candidate will be required to be on‑site for 2 to 3 days a week. 36 hours a week, Monday to Friday, we are open to part‑time and full‑time hours. What you should bring to the role

To thrive in this role, the essential criteria you’ll need is:

• Hold a degree in Electrical Instrumentation,
  Control & Automation , 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.
• Be a leader in promoting a culture of Health, Safety and wellbeing.
• Have significant experience working in a design or related role.
• Have detailed technical knowledge, of asset standards, and expertise within your discipline plus experience of working across engineering disciplines.
• Active input into the Stage Gate and Technical Governance of projects.
• 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 from £55,000 to £65,000 per annum, depending on skills and experience.
• 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 well‑being.

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.

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…