Mechanical Maintenance Engineer

About the role

We are seeking a Mechanical Maintenance Engineer to join a well‑established FM organisation in Central London. You will be responsible for the upkeep and optimisation of heating, cooling and ventilation plant across commercial buildings.

Key responsibilities

• Execute planned preventative maintenance on boilers, burners and heating plant.
• Respond to reactive calls for leaks, blockages and heating/cooling failures.
• Maintain air handling units, including belt changes, filter replacements and motor checks.
• Monitor and repair fan coil units, valves and actuators.
• Carry out weekly cooling‑tower inspections and water‑hygiene temperature checks, managing water‑treatment regimes to meet L8 legionella compliance.
• Inspect and service centrifugal pumps, performing seal and bearing maintenance.
• Overhaul pressurised heating and chilled‑water expansion systems.
• Use BMS software to monitor flow rates, set‑points and overall plant performance.
• Perform minor plumbing repairs and sanitary‑ware maintenance.
• Supervise specialist HVAC subcontractors during chiller or boiler overhauls.
• Log all mechanical works and statutory inspections in the CAFM system and issue permits for hot‑works or confined‑space entry.
• Test and maintain fire dampers and smoke‑extraction systems.
• Assess pressure vessels and safety valves for insurance inspections.
• Identify plant improvements to increase energy efficiency and reduce water waste, working closely with the electrical team on integrated control systems.

Required profile

• Level 3 Mechanical qualification (or equivalent) relevant to commercial building services.
• Experience working in a facilities‑management or FM environment.
• Eligibility to live and work in the United Kingdom.

Required skills

• Boiler and heating‑plant maintenance.
• Air‑handling unit servicing.
• Fan‑coil unit and valve troubleshooting.
• Cooling‑tower inspection and water‑treatment management (legionella compliance).
• Centrifugal‑pump maintenance.
• Pressurised heating and chilled‑water system overhauls.
• BMS (Building Management System) operation.
• CAFM (Computer‑Aided Facility Management) logging.
• Fire‑damper and smoke‑extraction system testing.
• Pressure‑vessel and safety‑valve assessment.

What we offer

• Competitive salary £40,000‑£45,000 per year.
• Monday‑Friday, 8 am‑5 pm working pattern.
• Central London location.
• Supportive, diverse workplace that values equality and reasonable adjustments.