Process Engineer – Wastewater & Sludge Treatment

Joining an established engineering centre of excellence, where you will contribute to future treatment solutions, support strategic decision‑making and help develop best‑practice standards.

What you’ll be doing as a Process Engineer – Wastewater & Sludge Treatment

• Designing treatment processes — developing wastewater and sludge treatment solutions that meet regulatory, environmental, and internal performance standards.
• Collaborating across disciplines — working with engineering, technical, and operational teams to deliver integrated, high‑quality project outcomes.
• Improving design standards — contributing to the evolution of internal design standards and best practices.
• Providing technical assurance — offering expert review, sign‑off, and guidance throughout project delivery and handover.
• Supporting operational teams — delivering technical input to optimise performance and troubleshoot issues.
• Developing engineering capability — helping shape a strong, sustainable engineering community from entry level to specialists.

Base location: Hybrid - Clearwater Court - RG1 8DB

Working pattern or hours: 36 hours Mon- Fri

Necessary requirements for the role: Regular travel to sites as needed by the project and weekly attendance to Clearwater Court.

What you should bring to the role
To thrive in this role, the essential criteria you’ll need is:

• Degree‑level qualification in Chemical Engineering or a related discipline.
• Understanding of wastewater and sludge treatment processes and how they support regulatory compliance.
• Analytical and problem‑solving strength with the ability to translate complex challenges into practical solutions.
• Clear, confident communication to work effectively with diverse stakeholders.
• Strong organisational skills and the ability to manage multiple priorities.
• Proficiency in Microsoft Office, particularly Excel.
• Commitment to diversity in engineering and contributing to an inclusive culture at Thames Water.
• Progress toward chartership with a recognised professional institution.

What’s in it for you?

• Competitive salary from £40,000 to £60,000 per annum depending on experience. 
• 26 days holiday per year increasing to 30 with the length of service (plus bank holidays)
• Performance-related pay plan directly linked to company performance measures and targets
• Generous Pension Scheme through AON
• Access to lots of benefits to help you take care of you and your family’s health and wellbeing, and your finances – from annual health MOTs and access to physiotherapy and counselling, to Cycle to Work schemes, shopping vouchers and life assurance.

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.