Construction Assurance Manager

Are you an experienced construction professional with a background in wastewater, or a background in another industry with transferable skills?
Thames Water has an exciting opportunity for you!

Are you an experienced construction professional—whether from wastewater or another industry with transferable skills? Thames Water is looking for a Construction Assurance Manager to lead on major infrastructure projects, driving construction excellence and ensuring our assets are delivered safely, sustainably, and to the highest standards. If you thrive on leading teams, solving complex challenges, and delivering high‑quality outcomes, we want to hear from you.

What you’ll be doing as a Construction Assurance Manager

• Providing expert technical understanding of wastewater treatment processes to ensure construction activities protect the day‑to‑day operation of our treatment plants.
• Ensuring compliance with environmental requirements in asset design and delivery, monitoring contractor performance, and driving improvements where needed.
• Managing consultant specialists and SMEs to deliver robust construction assurance across all wastewater projects within your portfolio.
• Working closely with Asset Management, Engineering, and Operations to align solutions, share lessons learned, and support consistent design and delivery.
• Supporting contractor and consultant assessment, selection, and appointment.
• Leading the Operational Integration team to ensure project deliverables are clear, achievable, and agreed upon by all stakeholders.
• Verifying and approving key project documentation, including Project Delivery Plans, Commissioning Plans, and test plans.

Location
You’ll be based at an office within the East London catchment, primarily supporting Beckton and Crossness STW, with travel expected across the wider Thames Water region.
This role requires 4 days per week on-site, depending on project demands.
36 hours per week, Monday to Friday.
A full driving licence and access to a vehicle are essential.
This role includes a £5,800 annual car allowance.

What you should bring to the role

• An engineering degree or equivalent experience in a similar construction or engineering position.
• Strong technical understanding of wastewater treatment works design, construction, and operations—or substantial experience in another complex process environment.
• The capability to undertake detailed technical reviews of project information.
• NEBOSH General or Construction Certificate.
• Knowledge of performance and quality management principles.

What’s in it for you?

• Competitive salary from £60,000 to £79,000 per annum, depending on the skills and experience of the successful candidate.
• This role will come with a car allowance of £5,800 per annum.
• 26 days holiday per year, increasing to 30 with the length of service. (plus bank holidays).
• Annual Bonus.
• Private Medical Health Care.
• Contributory pension – Defined Contribution - Maximum of 12% - 2x employee contribution.
• Personal Medical Assessments – Open to all once a year.
• 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

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.