Mobile HIU Engineer in London

Location: London (covering Stratford/Battersea/Wandsworth)

Salary: Competitive Salary + Shift allowance + On call bonus + Pension/Healthcare

The Client: My client is a prominent and forward-thinking energy infrastructure provider in the United Kingdom, specializing in the design, delivery, and long‑term operation of large‑scale decentralized low‑carbon utility networks. The company focuses heavily on urban district heating, cooling, and power solutions, managing critical assets that supply sustainable energy to thousands of residential and commercial properties. Renowned for its engineering excellence and commitment to the green transition, the business integrates cutting‑edge technologies like industrial heat pumps and waste‑heat recovery systems to drive urban centres toward a zero‑carbon future. Employees benefit from working within a safety‑first, technologically progressive environment that prioritises long‑term asset reliability, environmental sustainability, and structured career development within the renewable utilities sector.

The role: Reporting to the HIU Team Manager you will be responsible for the day‑to‑day tasks associated with heat interface units, including planned and reactive maintenance. You will work closely with the service desk team to ensure a high level of service to our residential customers. As a fully qualified HIU technician, there will be a chance for you to train/mentor a Trainee HIU Technician.

Key Responsibilities:

• HIU/CIU inspections and reactive maintenance for loss of heat or cooling within the required timeframe of our Residential Supply Agreements.
• Carry out repairs identified during servicing, including removal/replacement of pumps, valves, and actuators, plus bleeding systems.
• Updating work orders in a timely manner and in accordance with company training via our asset management system.
• Liaising with our service desk to ensure any on‑hold jobs are rebooked and closed out as soon as possible.
• Be in charge of your own van stock and responsible to contact management when critical parts are required.
• Work in a safe manner and in accordance with the company’s Health & Safety policy; proactively help and support others to achieve team objectives.
• Heat meter works such as replacing battery, replacing meter itself, or investigating why error codes are appearing on meters with the internal Metering Team.
• Report of PPMs/reactive jobs completed, on hold or requiring further action from other teams on a bi‑weekly basis to management.
• Ensure the company escalation process is understood and followed when further action is required to reinstate heat/cooling to a residential property, outside the remit of your job description (e.g., plant room temperatures are low).
• Deliver a first‑class service to customers.
• Effectively prioritise and perform tasks under pressure.

Skills & Competencies:

• Full UK driving licence.
• Proven experience in working in the plumbing or HVAC industry.
• Experience with working in a residential environment.
• Demonstrable technical knowledge and experience in communal and district heating systems.
• Proven experience in maintenance and troubleshooting of heat interface units (HIUs).
• A positive attitude towards work and willingness to get tasks completed on time while managing conflicting deadlines.
• Passion and interest in learning about emerging technologies within the energy market and supporting the drive to Net Zero.
• Ability to work independently and as part of a team.
• Demonstrable communication skills, both verbal and written.
• Demonstrable IT skills, including Microsoft Office applications such as Outlook, Excel, and Word.
• Qualification to ND / City & Guilds / NVQ level 3 in Mechanical is desirable but not essential.