HIU Engineer

About the role

The HIU Engineer is a hands‑on role where you’ll be working across residential developments, ensuring reliable and efficient heating and cooling systems for our clients and customers.

You’ll take pride in delivering high‑quality work, providing excellent customer service and representing Insite Energy on‑site.

• Replacing, maintaining, and servicing Heat Interface Units (HIUs), mainly in occupied homes.
• Servicing and maintaining Mechanical Ventilation Heat Recovery (MVHR) systems.
• Replacing, maintaining, and servicing Fan Coil Units (FCUs) and cooling meters.
• Conducting in‑property heat and cooling meter servicing and verifications.
• Diagnosing faults and problem‑solving issues on site, liaising with other trades and contractors.
• Installing and maintaining in‑property heating and cooling controls.
• Deploy Insite IT and PAYG smart metering systems on new build and residential sites.
• Retrofit and rewire existing Credit & Pre Payment systems for optimal performance.

• Field‑based, mostly across central London.
• 37.5 hours per week.
• Monday to Friday working 7.5 hours per day between 08:00 and 20:00.

• Minimum qualification of NVQ level 2, or equivalent, in plumbing and heating.
• HIU maintenance and servicing.
• Certified in 18th edition domestic wiring.
• CSCS card.
• SMSTS or H&S qualification – desirable.
• First aid trained – desirable.
• Full driving licence essential.
• Positive attitude towards providing customer service excellence in all aspects of work.
• Happy to work as an individual but contribute to the team goals, ethos and share best practice.

• A field‑based role with variety, no two days are the same.
• A collaborative, people‑first culture where your technical expertise is valued.
• Opportunities to grow your skills through continuous learning and hands‑on experience.

• Salary: £32,000 to £47,000 depending on knowledge, skills and experience.
• Bonus: £6,000 KPI related bonus.
• Holiday Allowance: 25 days of holiday per year, plus English bank and public holidays, plus an additional day of Birthday leave.
• Company van: Driving licence (with no / low penalty points) essential. Personal usage permitted subject to tax and fuel charges.
• 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.

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.

• Community
• Innovation
• Excellence
• Sustainability