Mobile Mechanical/HIU Engineer

Valoris Group; London; On-site; GBP 45,000 - 50,000; Full time

Job summary

An established industry player is seeking a Mobile Mechanical/HIU Engineer to join their dedicated team. With over three decades of experience, this role offers a dynamic work environment focused on servicing commercial sites within Greater London. You'll be responsible for maintaining hydraulic heating systems, performing fault finding, and ensuring compliance with health and safety standards. This position comes with a competitive salary, generous overtime opportunities, and a comprehensive benefits package, including access to private GP services and wellness programs. If you're looking to advance your career in a supportive environment, this is the opportunity for you.

Benefits

25 days holiday + 8 statutory days

Loyalty bonus after two years

Sick pay scheme

Life assurance (2 x basic salary)

Access to private GP services

Reimbursement for eye care checks

Employee rewards program

Comprehensive training and mentoring

Access to onsite gym and spa

Bring your dog to work initiatives

Qualifications

• Minimum of 3 years experience in mobile HVAC or building services.
• Valid UK driving licence and clear DBS record.

Responsibilities

• Maintenance and servicing of hydraulic heating and water systems.
• Setting up and maintaining inverter-driven pumps.
• Diagnosis and replacement of pumps and valves.

Skills

Hydraulic heating systems

Hot and cold water systems

Booster systems

Inverter-driven pumps

Pipework commissioning

Health and safety standards

Job description

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.