If you’re a senior Mechanical or Electrical Engineer looking to apply your expertise where it genuinely matters, this is an opportunity to influence the upgrade of some of the UK’s most critical wastewater treatment assets—protecting the environment and serving millions of customers every day.
We’re seeking a Senior Technical Assurance Engineer to provide technical authority across major wastewater projects within Thames Water’s AMP investment programme.
You’ll work at the heart of complex, high‑value schemes—strengthening resilience, improving environmental outcomes, and ensuring essential infrastructure is safe, sustainable and built to last.
With projects valued between £30m and £200m+, spanning feasibility through to delivery and handover, this role offers real scale, professional challenge and the opportunity to leave a meaningful engineering legacy.
What you’ll be doing
Lead technical assurance across major capital projects, ensuring delivery to time, cost and quality
Shape engineering solutions that balance innovation, resilience and value for money
Champion a strong health, safety and wellbeing culture, supporting Thames Water’s Triple Zero ambition
Collaborate closely with contractors, consultants and internal stakeholders to ensure compliance with technical, environmental and regulatory standards
Ensure solutions meet the Project Brief, stakeholder requirements and deliver best Whole Life Cost
Work within a collaborative environment across engineering, commercial and delivery disciplines, engaging with a wide and diverse supply chainHybrid working – based at Clearwater Court with travel to other sites
Minimum 3 days on site per week
36 hours per week, Monday to Friday
Full‑time and part‑time hours are considered, supporting flexible and inclusive working
What you should bring to the role
To thrive in this role, you’ll bring:
A degree in Mechanical or Electrical Engineering, or equivalent practical experience
We welcome candidates from the water sector and those with strong transferable skills from other regulated infrastructure environments.
A strong commitment to Health, Safety and wellbeing
Proven experience in a technical leadership or assurance role, contributing to complex major projects across the full lifecycle
Deep technical expertise within your discipline, with experience working across multi‑disciplinary engineering teams
Strong commercial awareness and a practical understanding of engineering and delivery contracts
A collaborative mindset aligned to Thames Water’s Values
Resilience, tenacity and motivation to safely deliver outcomes in pressured, high‑profile environmentsWhat’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.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
Salary description
£55000.00 - £65000.00 per year