Location
South West London - Ashford Common (TW15 1RU), Hampton (TW12 2ES) & Walton-on-Thames (KT12 2EG)

Hours
36 hours per week (Monday to Friday), plus inclusion on an out-of-hours rota with additional payment

Salary
£46,000 to £58,000 per annum, depending on skills and experience

About the Role
Thames Water is seeking 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 improvements, resilience planning, future protection of public health, and efficient, effective water treatment operations.
The role involves maintaining water quality from source to service reservoirs, responding promptly to incidents, events, and performance shortfalls. You will work within a small team of Process Scientists providing technical support to ensure compliance and champion optimisation initiatives to reduce costs or improve quality at no additional cost.
Key responsibilities include:
- Monitoring water quality from source to service reservoir
- Investigating water quality failures/events at company assets and escalating to the Drinking Water Safety Plan (DWSP)
- Providing recommendations to internal and external departments to prevent events/failures
- Offering technical support to Production and Capital Delivery schemes to meet water quality requirements
- Supporting internal water treatment works audit processes (DWSP) and conducting treatment reviews
- Representing the company in stakeholder meetings to build awareness internally and externally
- Undertaking out-of-hours technical support on a one-in-six rota, with training provided

Benefits
- 26 days holiday per year, increasing to 30 with length of service (plus bank holidays)
- Generous pension scheme through AON with a maximum employer contribution of 12% (2x employee contribution)
- Performance Related Pay Plan (PRPP) with a maximum of 10% of salary and on-target of 5%
- Access to a wide range of benefits supporting health, wellbeing, and finances including annual health MOTs, physiotherapy, counselling, Cycle to Work schemes, shopping vouchers, and life assurance

About Thames Water
We are the UK’s largest water and wastewater company, serving over 16 million customers. We are committed to building a better future for our customers, communities, people, and the planet. Thames Water offers meaningful career opportunities, flexible working arrangements, and excellent benefits. Join us to make a daily difference while protecting water for future generations.

Experience
- Degree qualified in an appropriate discipline with postgraduate experience or equivalent industrial experience in a related field
- Experience in investigative work with an inquisitive mindset
- Background in water science or process engineering within a regulatory framework is advantageous
- Awareness of Industry Best Operating Practice for potable water treatment and transmission is beneficial

About you
- Enthusiastic self-starter with strong organisational, communication, and interpersonal skills
- Able to liaise effectively with internal stakeholders on a daily basis
- Logical and analytical thinker who maintains a positive and professional approach when dealing with customers
- Willingness to work out-of-hours on a rota basis
- Valid UK driving licence essential as travel to multiple sites is required; transport will be provided

Qualifications
- Degree level qualification in a relevant discipline or equivalent industrial experience
- Valid UK driving licence