Air Conditioning Engineer - Property Care in London

Who is Size Group? Launched in 2009 as a small construction venture between two friends, Size Group brings together the vital elements of property from the construction of luxury buildings through to the maintenance and management of a property portfolio.

We now seek a Mechanical Engineer to join our Property Care team on a permanent, full-time basis.

The Benefits

This is a great opportunity for an Air Conditioning Engineer with a construction background to join and grow within our forward-thinking and collaborative organisation. We offer:

• Auto enrolment to company pension scheme (opt-out option available)
• Private medical insurance
• 26 days annual leave
• Travel expenses for site-based staff

As part of a growing group with ambitious plans, you’ll benefit from strong leadership support, visible career progression, and the chance to help shape the success of our most high-profile projects.

The Culture

At Size Group our values underpin who we are. They form an important benchmark for everyone – collectively and individually. We are:

• Empathetic - People-driven and focused
• Tenacious - Relentless pursuit of the highest standards
• Integrity - Integrity earns trust. Trust builds relationships
• Entrepreneurial - Self-starters that push beyond the obvious

We boast a culture that is focused on training and development, career paths and internal progression. What’s more, we’re committed to our employees and offer a range of benefits to support your lifestyle both in and out of the workplace.

The Role

As an Air Conditioning Engineer you will be responsible for the maintenance, repair, and performance optimisation of cooling, ventilation, and climate‑control systems across our portfolio of luxury residential properties. Key responsibilities include:

• Carrying out routine servicing and inspections on AC systems including VRF/VRV, split systems, ducted units, air handling units, fan coils, and ventilation plant.
• Responding promptly to AC breakdowns and faults, conducting fault finding measures to diagnose issues.
• Monitoring system performance and identify opportunities to improve efficiency, comfort, and longevity.
• Supporting property and estate managers with advice ahead of seasonal demands (e.g., summer cooling loads).
• Liaising with Property Managers, estate teams, clients and specialist subcontractors professionally and respectfully.
• Maintain thorough documentation of maintenance activities through service logs, asset registers and reports.

About You

To be considered for the role of Mechanical Engineer you will need to demonstrate:

• Proven experience as an AC, HVAC, or Refrigeration Engineer, preferably within a luxury residential setting.
• Strong knowledge of VRF/VRV systems, split systems, ducted units, AHUs, FCUs, and ventilation plant.
• F‑Gas Category 1 qualification (essential).
• Ability to work independently as well as alongside a team of property care specialists and subcontractors.
• Excellent diagnostic skills and the ability to resolve issues efficiently and safely.
• Strong attention to detail and pride in workmanship.
• Good communication skills, able to liaise confidently with property managers and occasionally clients.
• Full UK driving licence and access to a car is desirable.

How to Apply

So, if your skill set matches the above and the prospect of helping deliver some of the country’s finest projects appeals to you, please reach out by clicking Apply. Your application will be processed by Size Group, and interviews will be conducted on a rolling basis as suitable candidates apply. We therefore encourage you to submit ASAP to avoid missing out!