Lead Mechanical Building Services Engineer
Location: Central London (Whitehall)
Position Type: Permanent, Full-time (40 hours/week, Mon–Fri)
Are you an experienced Mechanical Engineer with a strong background in building services and critical infrastructure?
We are currently recruiting for an established delivery partner to lead mechanical engineering operations across a high-profile, mission-critical estate in Central London. This is a technical leadership role offering full ownership of complex mechanical building services within a secure, compliance-driven government environment.
The Role
As the lead mechanical authority on-site, you will combine hands-on operational maintenance with project delivery. You will take responsibility for ensuring system reliability across a mix of modern and legacy infrastructure, managing critical plant, and driving compliance standards in an environment where zero-downtime is essential.
Key Requirements
- Proven background in mechanical engineering within building services, facilities management, or critical infrastructure (e.g., defence, healthcare, data centres).
- Strong hands-on experience maintaining HVAC systems, pumps, valves, pipework, and water hygiene systems.
- Practical knowledge of diagnosing faults and extending the lifecycle of legacy mechanical plant.
- Deep understanding of statutory compliance and safe working practices.
- Ex-military engineers (Royal Navy, British Army, Royal Marines, RAF) with relevant mechanical building services or marine engineering experience are strongly encouraged to apply.
Security Requirements
- Candidates must be sole UK nationals eligible for Developed Vetting (DV) clearance.
- Candidates can commence the role with Security Check (SC) clearance while undergoing the DV clearance process.
Key Responsibilities
- Take technical ownership of all mechanical systems, PPM delivery, and reactive maintenance across the estate.
- Diagnose complex faults and perform hands‑on troubleshooting across HVAC systems, chillers, AHUs, pressurisation, water hygiene, and fuel storage plant.
- Manage, maintain, and upgrade ageing or legacy mechanical infrastructure to ensure continuous reliability.
- Ensure full compliance with statutory regulations, safe systems of work, and health and safety standards.
- Oversee specialist sub-contractors for both routine maintenance and project delivery.
- Produce technical specifications, reports, and scope‑of‑work documents for remedial works and system upgrades.
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