Senior Process Scientist

Ashford Common - TW15 1RU, Hampton - TW12 2ES, Walton-on-Thames - KT12 2EG

Job title Senior Process Scientist Ref 42101 Division Asset Operations & Capital Delivery Location Ashford Common - TW15 1RU, Hampton - TW12 2ES, Walton-on-Thames - KT12 2EG Contract type Permanent Full / Part-time Full-time Hours 36 hours per week Salary Offering a salary between £46,000 to £58,000 per annum, depending on skills and experience. Job grade B Closing date 20 / 01 / 2026

Thames Water is looking for an experienced and motivated Senior Process Scientist to join our fast-paced West London team.

In this pivotal role, you will have a positive and tangible impact on the water quality for the Capital's drinking water. You will play a central role in ensuring positive improvements, resilience planning, improvements for the future protection of public health and ensuring water treatment operations are efficient and effective.

The purpose of this role is to ensure that water quality is efficiently maintained from the source to service reservoirs and incidents, events and performance shortfalls are responded to in a timely and effective manner. You will be working within a small team of Process Scientists, who provide technical support to ensure compliance as well as championing optimisation initiatives to reduce cost or improve quality at no additional cost.

What you’ll be doing as a Senior Process Scientist :

• Water quality monitoring from the source to the service reservoir.
• Investigating water quality failures / events at company assets and raising to the Drinking Water Safety Plan (DWSP).
• Provide recommendations to both internal and external departments on how events / failures can be prevented.
• Providing technical support to Production and Capital Delivery schemes to ensure that water quality requirements are met.
• Supporting internal water treatment works audit process (DWSP) and conducting Treatment reviews.
• Represent the company in meetings with stakeholders to build awareness both internally and externally.
• Undertaking out-of-hours technical support on a one-in-six rota, for which appropriate training will be given.

Working pattern or hours :

36 hours per week (Mon-Fri), plus inclusion on an out-of-hours rota for which you will receive additional payment.

What should you bring to the role?

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

Additional skills and experiences would be great to have / bring :

What’s in it for you?

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 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 we’ll embrace a culture of safety and quality across the water network.

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.

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