Senior Field Technical Engineer

About the role

As Senior Field Technical Engineer you'll lead a team of engineers maintaining and servicing Heat Interface Units (HIUs), metering systems, and wider heat network equipment across residential and commercial sites. You'll also play a key part in developing our apprentices and junior engineers, ensuring they have the skills, confidence, and support to grow.

What you'll be doing

• Leading on HIU servicing, fault diagnosis, maintenance, and replacements.
• Carrying out preventative and reactive maintenance on HIUs, meters, valves, FCUs, MVHRs, and associated systems.
• Supporting plant room and network-level works — pipework, strainers, valves, and controls.
• Supervising and mentoring engineers, apprentices, and subcontractors, ensuring high standards of workmanship.
• Installing, commissioning, and maintaining PAYG and metering systems.
• Conducting site surveys, reporting defects, and recommending improvements.
• Supporting compliance by promoting safe working practices and assisting with audits.
• Helping to onboard new engineers — from tooling and stock to training and integration.
• Managing team morale, development, and technical upskilling.

Location and working hours:

• 37.5 hours per week, Monday to Friday
• 7.5 hours per day between 08:00 to 20:00
• Primarily field based across Greater London
• Office location: Moorgate, London (WeWork)

Required skills and attributes:

• NVQ Level 2 (or higher) in Plumbing & Heating.
• Experience leading, mentoring, or coaching field-based engineers.
• Strong technical background in HIUs, heating, and/or metering systems.
• Excellent communication skills with the ability to work with clients, contractors, and residents.
• Full UK driving licence (minimal or no penalty points).
• A proactive, safety-first approach with attention to quality and detail.

Desirable qualifications:

• 18th Edition Domestic Wiring
• SMSTS / H&S qualification
• First Aid trained
• CSCS card

Why join us?

At Insite Energy, our strength lies in our people and the connections we build. You'll be part of a supportive team culture where collaboration, respect, and development are at the heart of how we work. We'll give you the tools, training, and opportunities you need to thrive, while you help shape the next generation of engineers.

About Insite

Established in 2009, Insite Energy is a dynamic, fast-growing company that provides services to heat network suppliers in the UK. The services provided include metering & billing of residential customers, the installation (and retrofit) of credit billed and pay-as-you-go equipment, and ongoing maintenance and management of the heat network schemes.

We pride ourselves on our commitment to working as one team to put the customer and client first, delivering a reliable, competitive, and professional service. We are tireless in our efforts to be the best at what we do, which is reflected in our Trustpilot rating.  With just over 70 current employees, we are small but mighty, delivering more by working together.

At Insite Energy, we embrace diversity and inclusion. We value all backgrounds, identities, and experiences. We're committed to providing equal opportunities for all and offering reasonable adjustments to ensure accessibility and inclusivity throughout the application process and in the workplace.

Benefits:

• Salary:  Competitive salary, dependent on skills and experience
• Holiday Allowance: 25 days of holiday per year, plus English bank and public holidays, plus an additional day of Birthday leave.
• Company van
• Pension Scheme: Employer pension contribution matched at 4%.
• Employee Assistance Programme (EAP): Free, confidential support available for personal and professional challenges.
• Corporate Social Responsibility (CSR) Programme: "DO RIGHT WITH INSITE" provides up to 2 paid days off per year for volunteering with company-led initiatives. Additional information can be viewed here
• Social Events: Regular company social events, including an annual Summer Party and Christmas Party.
• This benefits package offers a vibrant and supportive work environment, with opportunities for professional growth, work-life balance, and community engagement.

Our Values: 

Community

Innovation

Excellence

Sustainability