Construction Assurance Engineer

We have an exciting opportunity for you…
We have an exciting opportunity for you to play a key role in the development and modernisation of Clean Water Infrastructure across the Thames Valley and surrounding areas.

At Thames Water, we know that diverse teams build better outcomes. As a Construction Assurance Engineer, you’ll help deliver life’s essential services while protecting our environment — and you’ll be supported to grow, learn and thrive in a role that genuinely makes a difference.
If you care about high‑quality engineering, sustainability and leaving a positive legacy, we’d love to hear from you.

What you’ll be doing as a Construction Assurance Engineer
You’ll play an integral role in construction assurance across wastewater projects, working collaboratively with project teams and contractors to support safe, compliant and successful delivery.

Key responsibilities include:

• Supporting design and delivery assurance activities, helping to identify risks and working constructively with stakeholders to resolve them.
• Carrying out health and safety audits, ensuring standards are met and improvements are embedded.
• Monitoring construction progress, reporting on performance, and supporting issue resolution and escalation when needed.
• Identifying, managing and closing non‑conformances in line with agreed processes.
• Managing snags and supporting defect resolution, aftercare and performance testing post‑takeover.
• Monitoring, agreeing and approving takeover testing with the wider project team.
• Ensuring project documentation is complete, accurate and meets Thames Water specifications.
• Working as a valued member of one or more project teams, building strong relationships with contractors and operational colleagues.

Hybrid – Thames Valley Based
This is a hybrid role, with regular site presence across the Thames Valley.

• On site 3–4 days per week
• 36 hours per week, Monday to Friday

A full UK driving licence and access to a car are required.

A £4,500 annual car allowance is provided.

We recognise the importance of balancing work and life commitments and offer flexibility wherever possible.

What you should bring to the role
If you have many — but not necessarily all — of the following, we encourage you to apply:

• An HNC (or above) in an engineering discipline, or equivalent experience in a similar construction or assurance role.
• An awareness of health and safety in construction environments. (SMSTS training can be supported if you don’t currently hold it.)
• Experience or understanding of design, construction and operational delivery within utilities, infrastructure or construction settings.
• Background in project delivery or integration within a construction environment.
• Confidence communicating with stakeholders, with the ability to collaborate, challenge constructively and build trust.

What’s in it for you?
This is a great opportunity to build your career within a supportive, inclusive project environment — working alongside experienced professionals who value collaboration, development and doing the right thing.

• Competitive salary: £40,000 – £60,000 per annum
• £4,500 annual car allowance
• 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.
• 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.