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Outfall Investigation Technician
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About The Role
The Outfall Investigation Technician, based in Rickmansworth, will identify and trace pollution sources within affected catchments for Thames Water. This permanent, full-time position offers a competitive salary up to £33,000 per annum. Your duties involve narrowing problem areas to street and property level using lift and look tracing, caging, CCTV, and sampling. You will survey domestic and commercial premises to detect misconnections through dye testing, then document findings for customer rectification. Follow-up visits confirm fixes, and you may assist with reactive tracing across network regions. This role requires methodical investigation skills and a commitment to resolving environmental issues.
We are looking for an Outfall Investigation Technician
The Outfall Investigation Technician role is to identify and trace pollution in the affected catchments, narrow down areas and sub-catchments to street and property levels using lift and look tracing, caging, CCTV and sampling.
You will then carry out property surveys at domestic and commercial properties to check connections using dye and CCTV and identify misconnections or other pollution sources. You will then complete a survey sheet detailing the issue for the customer to rectify.
The role will also require follow-up visits to check rectifications, assist customers in finding solutions, and diagnose pollution at outfalls. It may also support network regions with reactive tracing, where required and STW catchment investigations.
Technicians may also need to install missing surface water rodding eye caps in private drains, which requires confined space entry and light civils work.
For successful candidates, interviews will be arranged week commencing 7th September 2026.
What you’ll be doing as an Outfall Investigation Technician
- Working with the Project Advisor on various catchments and projects to resolve PSWOs.
- Pollution diagnosis.
- Pollution tracing and narrowing down using CCTV, lift and looks, caging, and ammonia probe.
- Carrying out property surveys and testing connections.
- Identify misconnections and draw up survey sheets.
- Check misconnection rectifications.
- Advising customers.
- Installing missing rodding eye caps in private surface water drains.
- Chapter 8 NRSWA short during highway set-ups.
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Location: Field-based with a flexible location within the Thames Water Operating Area, ideally Beckton STW, Mogden STW, Maple Lodge STW, Hogsmill STW.
Hours and Working Pattern: 38 hours a week, Monday-Friday.
Other: A Van, PPE and Tools will be provided.
What You Should Bring To The Role
To thrive in this role, the essential criteria you’ll need is:
- Full driving licence.
- Competent at using the appropriate IT systems.
- Excellent organisation skills – recording accurate notes on the system.
- Confident communicator and able to manage difficult situations calmly.
- Manage your own workload and projects – day-to-day and weekly.
- Not colour blind.
Additional skills and experiences would be great to have/bring:
- Some knowledge of drainage and sewerage systems is desirable.
- Ideally, experience of using GIS and O365 software.
What’s in it for you?
- Competitive salary up to £33,000 per annum.
- Annual Leave - 24 days holiday per year, increasing to 28 with the length of service (plus bank holidays)
- Generous Pension Scheme through AON.
- Performance-related pay plan directly linked to company performance measures and targets
- 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.
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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.
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