HIU Engineer
Confirmed on the employer's own hiring board on Oct 21, 2026. First seen by Alion on Oct 21, 2026.
Salary: Attractive salary plus benefits
Closing date: 15/11/2026
HIU Engineer
Join the Team Powering London’s Low-Carbon Future
We're looking for a motivated HIU Engineer to help us deliver exceptional service across London’s most innovative energy networks.
If you’re ready to take your plumbing or heating career to the next level and want to be part of the UK’s transition to a cleaner, greener future this is the role for you.
About the role
The HIU Engineer is a field-based heating engineer responsible for maintaining, servicing and repairing Heat Interface Units (HIUs) and associated heating systems across London and the surrounding areas. Supporting a district heating network serving approximately 25,000 residents, the role is focused on ensuring customers have reliable heating and hot water within their homes.
The position combines planned servicing with reactive fault-finding, requiring engineers to diagnose and repair a wide range of heating system issues including HIUs, radiators, thermostats, motorised valves and heating controls. Engineers are expected to be comfortable working on S-Plan and Y-Plan systems and have a good understanding of low temperature hot water (LTHW) heating systems.
Whilst the role is primarily resident-facing, candidates should also have a basic understanding of district heating infrastructure and energy centres. HIU Engineers are often the first responder to heating outages and should be capable of carrying out initial diagnostics, identifying whether faults originate from the HIU, heating system or energy centre, and escalating plant-related issues where necessary.
Typical workloads include servicing 8-10 HIUs per day or attending 6-8 reactive heating and hot water breakdowns. Engineers participate in a 1-in-4 emergency call-out rota covering London and the surrounding areas alongside other HIU and Plant Engineers.
This role is ideal for experienced domestic or communal heating engineers looking to specialise within the growing district heating sector.
Key responsibilities
- Completing scheduled servicing of Heat Interface Units in accordance with the servicing procedure
- Providing reactive maintenance for loss of services within required Service Level Agreements
- Identification and review of equipment faults carrying out repairs where required
- Inputting and maintaining documentation and records using the company asset management software
- Carrying out general ad hoc maintenance tasks within Energy Centre Plantrooms
- Working in a safe manner and in accordance with the company’s Health & Safety policy
What you will need
- Hold a city & guilds qualification or equivalent
- Preferably educated to Degree level
- Experience wiring and fixing, Boilers/Heating, HVAC, Steam, Air Handling, Cooling, Renewable Energy (e.g Solar or Heat Pumps), or similar
- Full UK manual driving licence
The Company
Vital Energi is a major provider of renewable energy infrastructure and systems to the public and private sectors. We are supporting Hospitals, Universities, New Build developments, Towns and Cities as well as Industrial and Commercial clients to decarbonise their buildings.
We have and continue to work on ground-breaking projects throughout the UK which are supporting the UK’s Net Zero targets, such as the recently announced £1 billion low-carbon infrastructure project for Westminster.
With plans to double our headcount over the coming years, supported by offices opening in new locations across the country and our strong investment pipeline, coupled with our expansion into new markets such as industrial power generation with our very own Energy-from-Waste facility, there is no better time to join the family here at Vital Energi.
Applications will be processed within 28 days of receipt. If you have not heard from us within this time period it will mean that your application has unfortunately been unsuccessful.
The company is opposed to all forms of discrimination and will select for employment, training and promotion on the basis of suitability for the job and/ or merit. It is company policy that no job applicant or employee receives less favourable treatment than another on the grounds of sex, race, colour, age, ethnic or national origins, political affiliations, religious beliefs, marital status, physical disability or is disadvantaged by unjustifiable conditions or requirements.
Applicants must have the unrestricted and ongoing right to work in the UK for the duration of employment, without the need for sponsorship. Due to the nature of this role, we are unable to support visa sponsorship or employ individuals with time-limited permission or conditions attached to their right to work in the UK
Notice to Agency and Search Firm Representatives:
Vital Energi Utilities Ltd is not accepting unsolicited CVs from agencies and/or search firms for this job posting. CVs submitted to any Vital Energi Utilities Ltd employee by a third party agency and/or search firm without a valid written & signed search agreement, will become the sole property of Vital Energi Utilities Ltd. No fee will be paid if a candidate is hired for this position as a result of an unsolicited agency or search firm referral. Thank you