Field Technical Engineer – HIU

Insite Energy

Field Technical Engineer supporting installation, maintenance, and effective operation of heat network equipment in the UK. Working on construction schemes and in residential environments with a focus on customer service excellence.

Posted 4/12/2026full-timeLondon • 🇬🇧 United KingdomMid-LevelSeniorWebsite

About the role

Key responsibilities & impact

Support the installation, maintenance, and effective operation of heat network equipment
Installation and commissioning of Insite prepayment & controlled credit systems
Using a laptop and tablet device to commission metering equipment, update records and systems
Problem solving and fault-finding issues on site and liaising with other trades and the main contractor
Liaise with & report to site staff (clients, principal contractors, consultants & heating/plumbing sub-contractors)
Heat Interface Unit (HIU) replacement, maintenance, and servicing (mainly in occupied homes)
Installation and maintenance of in property heating and cooling controls
Conduct site surveys and assist the Installations Team with the installation and commissioning of new systems
Provide both pre-planned and reactive maintenance to plantrooms

Requirements

What you’ll need

Minimum qualification of NVQ level 2, or equivalent, in plumbing and heating
Certified in 18th edition domestic wiring (not essential, training can be provided)
CSCS card - Essential
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

Benefits

Comp & perks

Competitive base salary + KPI related bonus
Company van included (personal usage permitted subject to tax and fuel charges)
25 days of holiday per year, plus English bank and public holidays, plus an additional day of Birthday leave
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
Regular company social events, including an annual Summer Party and Christmas Party

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

installationmaintenancecommissioningproblem solvingfault-findingsite surveysheating controlscooling controlsheat network equipmentHeat Interface Unit (HIU)

Soft Skills

customer service excellenceteamworkcommunicationpositive attitudeliaisingreportingproblem solving

Certifications

NVQ level 2 in plumbing and heating18th edition domestic wiringCSCS cardSMSTS or H&S qualificationFirst aid trained