HIU Service Engineer – Heat Network Maintenance

About the role

Hemiko is seeking a dedicated HIU Service Engineer to join its Operations & Maintenance Residential Team. Reporting to the Technical Manager, you will deliver operation and maintenance services across a growing fleet of low‑carbon heat networks, focusing on the servicing and repair of Heat Interface Units (HIUs) from multiple manufacturers.

Key responsibilities

• Work under the direct supervision of the Technical Manager while regularly operating autonomously.
• Perform basic part replacement, attend breakdowns, and complete planned preventative maintenance in line with company schedules.
• Service, fault‑find and repair HIUs, and respond to reactive call‑outs to restore heat.
• Manage site‑based project work, develop scopes for plant remediation, and ensure safe isolation of equipment before work.
• Maintain clear, up‑to‑date online work orders and system records; assist with monthly mechanical PPM checks in plant rooms.

Required profile

• Organised, self‑motivated professional with a positive outlook, able to work in a fast‑growing, small‑team environment.
• Strong communicator comfortable interacting with internal teams, external clients and site‑based personnel.
• Willingness to take ownership of tasks and deliver high‑quality work on time.

Required skills

• Proven experience as a HIU service engineer, servicing units from various manufacturers.
• Basic electrical competency and ability to safely isolate mechanical and electrical equipment.
• Knowledge of heat network energy centres, plant rooms and district heating concepts (preferred).
• Full UK driving licence (valid for at least 12 months).
• NVQ Level 2 in Plumbing/Domestic Gas and Part G are advantageous.

What we offer

• Competitive salary £28,500‑£33,000 per annum with a discretionary performance bonus.
• 25 days holiday plus statutory holidays, with the option to buy or sell up to 5 additional days.
• Pension scheme, private health care, cycle‑to‑work and electric‑car lease schemes.
• Health and wellbeing support, continuous learning and development opportunities.
• Company‑provided laptop, tablet and mobile phone; 40‑hour work week.