High Voltage Technician

Thames Water; Greater London; On-site; GBP 50,000 - 61,000; Full time

Benefits offered by this job

Company van

PPE provided

Progression opportunities

Benefits package

Job summary

Thames Water is seeking a High Voltage Technician to maintain and repair HV/LV equipment across multiple London sites. You will work with the Senior Authorised Person (SAP), tackle fault-finding, and ensure safety and compliance while supporting SCADA systems.

The role requires electrical qualifications, HV experience, and a willingness to travel between Thames Water sites. A UK driving licence is essential and a van will be provided.

Qualifications

• Formal electrical trade qualifications or equivalent industrial/utility HV experience.
• Proficiency in fault-finding, maintenance and electrical safety compliance.
• AP15 HV qualification or willingness to train; 18th Edition certification.

Responsibilities

• Maintain and repair HV and LV equipment across Thames Water sites.
• Inspect HV and primary LV equipment to ensure safety and efficiency.
• Diagnose faults promptly and keep accurate compliance records.
• Supervise contractors and team members during maintenance.
• Travel extensively to multiple sites and support SCADA operations.

Skills

Fault-finding expertise

Electrical maintenance

Electrical safety knowledge

Team supervision

Education

AP15 High Voltage qualification

18th Edition Wiring Regulations

UK driving licence

Tools

SCADA system experience

Job description

Join our dedicated high-voltage maintenance team, where you'll play a vital role in ensuring the safe and efficient operation of critical infrastructure. Working alongside the Senior Authorised Person (SAP), you’ll tackle hand‑on fault‑finding, maintenance, and repairs of HV and LV equipment. Covering several dynamic sites across London, this role offers variety, technical challenges, and the chance to make a tangible impact every day.

What you’ll be doing as a High Voltage Technician

• As a High Voltage Technician, you'll take on the critical responsibility of maintaining and repairing high-voltage equipment across various Thames Water sites. This role ensures the smooth operation of essential infrastructure.
• Inspect and maintain HV and primary LV equipment to ensure operational safety and efficiency.
• Diagnose and resolve technical faults promptly, keeping accurate compliance records.
• Supervise contractors and team members during maintenance, ensuring adherence to safety and quality standards.
• Undertake SAP (Senior Authorised Person) training and uphold strict electrical safety rules.
• Keep tools, equipment, and systems in top operational condition.
• Travel extensively to multiple sites, providing technical support and overseeing SCADA system operations.

Base location:

Riverside STW – RM13 8QS

Due to the nature of this role, you can be based on a number of our sites depending on your location.

Working pattern:

45 hours per week, Monday to Friday (07:30 am to 5:00 pm). Opportunities for overtime may be available.

Requirements:

Electrical qualifications, fault‑finding expertise, and a valid UK driving licence.

All PPE, tools, a company van and a fuel card are provided.

What you should bring to the role

• Formal electrical trade qualifications or equivalent industrial/utility experience in HV systems.
• A mechanical background and being skilled in electrical work would be beneficial.
• Proficiency in electrical maintenance, fault‑finding, and understanding of electrical safety rules.
• 18th Edition Wiring Regulations certification (or 17th Edition with a willingness to upgrade).
• AP15 High Voltage qualification (ideal) or willingness to train.
• A great team player with excellent collaboration and interpersonal skills, and the ability to work with minimal supervision, is essential.
• Basic IT proficiency for operational tasks and record‑keeping.
• Full, valid UK driving licence to travel across the Thames Water sites.

What’s in it for you?

• Competitive salary up to £55,000 per annum, depending on experience and qualifications.
• Annual Leave: 24 days holiday per year, increasing to 28 with the length of service. (plus bank holidays.
• Company Van and PPE are provided.
• This role can offer a technically interesting career, development, progression and the responsibility of mentoring colleagues and trainees.
• Work as part of a diligent and dynamic team and experience the beautiful countryside surrounding the sites you’ll be travelling to daily.
• A great opportunity to be trained as a senior authorised person.
• Access to lots of benefits to help you take care of your and your family’s health and well-being, 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.

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.