About this role

HIU Senior Engineer

Salary : £40,000 - £50,000 + Bonus & Electric Car Scheme (DOE)

Location : London & South UK

Permanent, Full Time

Due to hiring timescales, sponsorship is unavailable for this opportunity

Are you an experienced HIU specialist looking to join an innovative leader in low-carbon district energy and take the next step into a senior, mentoring role?

A Specialist Renewable Energy Consultancy is expanding its operations and seeking a dependable HIU Senior Engineer to cover London and the South of the UK. This is a pivotal role within a highly supportive operations team, offering the chance to maintain complex heat networks and play a direct role in major city-scale decarbonisation projects.

The Opportunity

You will play a vital role in ensuring the efficiency and reliability of low-carbon heat networks. Your day-to-day remit involves a blend of hands-on technical maintenance, fault-finding, and team development:

Completing planned preventative maintenance (PPM) and reactive servicing of Heat Interface Units (HIUs) across various manufacturers.
Diagnosing complex faults, executing first-time fixes, and conducting root-cause analysis to resolve operational issues.
Managing site-based project works and assisting with 1-to-12 monthly mechanical PPM checks within commercial plant rooms.
Participating in a structured on-call rota (1 week in 4) to execute emergency callouts and reinstate heat securely.

The Package

Base salary of £40,000 - £50,000 (DOE) plus a discretionary performance bonus.
25 days annual leave + Bank Holidays (option to buy or sell up to 5 additional days).
Access to an Electric Car lease scheme and Cycle to Work scheme.
Private health care scheme, pension plan, and health and well-being support.
Company laptop, tablet, and mobile phone provided, alongside continuous learning opportunities.

Technical Essentials To be successful, you must demonstrate high-level technical proficiency and a commitment to safe working practices:

Mandatory

Minimum of 3 years’ direct experience working as an HIU Service Engineer.

Compliance Expert

Part P and Part G certifications.

System Knowledge

Strong working knowledge of heat network energy centres, plant rooms, and ability to read technical drawings (P&IDs).

Safety

Competency in mechanical and electrical safe isolation.

Mobility

Full UK Driving License held for a minimum of 12 months.