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Generator Field Service Engineer

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About The Role
Pertemps Thames Water seeks a Generator Field Service Engineer to cover Reading and the wider Thames Valley region. This full-time position carries a competitive salary of £44,000 to £65,000, dependent on your background. You will maintain, diagnose, and repair a fleet of Combined Heat and Power (CHP) spark ignition biogas engines across numerous operational sites. Duties include executing planned and unplanned maintenance, collaborating with existing CHP support personnel and external suppliers, and ensuring all tasks are completed safely. A solid grasp of engine diagnostics and mechanical repair is essential. Travel is required, so a flexible base anywhere in the Thames Valley is acceptable. This role suits a hands-on engineer seeking varied fieldwork with a major utility provider.
We currently have a great opportunity for you to join our waste treatment team as a Generator Field Service Engineer. As a successful candidate, your role will be to maintain, diagnose, repair and optimise the performance of a fleet of Combined Heat and Power (CHP) spark ignition biogas engines located across various Thames Water sites.
Due to the nature of this role with travelling in the Thames Water area, the ideal candidate can be based anywhere in the Thames Valley area.
What you’ll be doing as a Generator Field Service Engineer
- To carry out the planned and unplanned maintenance of the fleet of CHP Spark Ignition generators within a geographical region but not limited to.
- Work with current CHP support staff and suppliers to ensure all maintenance is carried out safely, with the least possible downtime and within budget.
- Complete service records and reports in an accurate and timely manner.
- Identification of parts required for the order, lubricants, and waste.
- Demonstrating a zero-compromise attitude towards health, safety, and well-being in all aspects of work.
- Ensuring excellent customer service.
- Working to benefit other team members with Skills from the product training.
Base Location – depending on your location, you can be based at any of our sites in the Thames Valley area.
Working Pattern - 45 hours per week, Monday-Friday. Plus, there is the inclusion of a standby rota for which you will receive additional payment. Plus, there is the opportunity to earn overtime at time and a half or double rates.
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You must have the ability to operate and optimise assets using engine/generator controls, such as ComAp and DIA.NE and TEM Evo.
What You Should Bring To The Role
To thrive in this role, the essential criteria you’ll need are:
- In-depth knowledge of all aspects of the operation and maintenance of internal combustion engines.
- Ability to carry out thorough, comprehensive, and methodical diagnostics on engine, generator and associated systems.
- Ability to operate and optimise assets using engine/generator controls, such as ComAp and DIA.NE and TEM Evo.
- Competent to work to a high level of quality, alone or as part of a team.
To be successful, you will have the following skills and experience:
- Ideally, NVQ/ C&G or an engine manufacturer's qualification in mechanical engineering.
- Electrical qualification is an advantage, but not essential.
- Proven working ‘hands-on’ experience working with internal combustion engines and associated systems.
- Natural / Bio / AD Gas engine, CHP, and gas system experience is desirable but not essential.
- Good communication and interpersonal skills are required.
- Full UK driving licence.
What’s in it for you?
- Competitive salary between £44,000 to £65,000 per annum depending on skills and experience.
- Standby rota payments & Overtime opportunities can increase this earning potential by up to a further £13,000 - £15,000 per annum upon completion of essential company training.
- Performance-related pay plan directly linked to company performance measures and targets.
- All PPE and tools, plus the provision of a van when on duty and on call.
- Annual Leave: 24 days holiday per year, increasing to 28 with the length of service. (plus bank holidays)
- Generous Pension Scheme through AON.
- Generous Paternity Leave, including 4 weeks paid and an optional 2 weeks unpaid.
- Enhanced Maternity Leave, 26 weeks full pay and 13 weeks half pay!
- 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.


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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.
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