Mobile Mechanical/HIU Engineer

Mobile Mechanical/HIU Engineer
Permanent | London and Surrounding Areas
£45,000 £50,000 basic + approx. £5,000 overtime

About the Opportunity
Valoris Group is working in partnership with an established leader in the building services sector, supporting their search for an experienced Mobile Mechanical/HIU Engineer. This business has operated successfully for over three decades, delivering maintenance and installation solutions across a prestigious commercial portfolio, mainly within Greater London and the M25.

Role Overview
This position is mobile, focused almost entirely within the M25, servicing commercial sites with occasional attendance at a Head Office located in Bishops Stortford. Engineers join a structured call-out rota (approximately 1 week in 7) with standby and enhanced overtime rates available.

Core Responsibilities

• Maintenance, servicing, and fault finding on hydraulic heating, hot and cold water, and booster systems.

• Setting up and maintaining inverter-driven pumps and associated controls.

• Pipework commissioning, balancing, and valve servicing.

• Pressure vessel and pressurisation unit installation and maintenance.

• HIU servicing and maintenance across a range of systems.

• System drain-downs and refills for complete buildings.

• Diagnosis and replacement of pumps, valves (modulating and directional), and plate heat exchangers.

• Working across central plant rooms, energy centres, and full building distribution networks.

Desirable Understanding

• General knowledge of gas appliances, electrical safety, and building management systems.

• Strong commitment to health and safety standards on site.

Package and Benefits

• Base salary between £45,000 £50,000 depending on experience.

• Realistic £5,000 additional earnings through overtime.

• 25 days holiday + 8 statutory days.

• Loyalty bonus following two years of service.

• Sick pay scheme and accident insurance.

• Life assurance (2 x basic salary).

• Access to private GP services and confidential counselling support.

• Reimbursement for annual eye care checks.

• Employee rewards and recognition programme.

• Comprehensive internal training and mentoring schemes.

• Access to onsite gym, spa facilities, and regular team events.

• Tech support desk.

• Bring your dog to work initiatives (site-based).

Candidate Requirements

• Currently residing in the UK with full right to work.

• Must live within a commutable distance of Central London.

• Valid UK driving licence and clear DBS record.

• Minimum of 3 years experience in a mobile HVAC or building services role.

Interested?
Valoris Group is representing this opportunity exclusively. If you are an experienced engineer seeking a career move into a reputable and supportive environment, we would be delighted to hear from you.