Mechanical Supervisor (HVAC & Refrigeration Bias)

Job Title: Mechanical Supervisor

Location: City of London

Salary: £60,000 + package 

Contract: Monday - Friday: 8am - 5pm

The Opportunity

Are you an experienced Mechanical & HVAC Specialist looking for a key technical role within a landmark commercial development in Central London?

We are seeking a Mechanical Supervisor to act as the primary technical authority for all mechanical, HVAC, and refrigeration systems across a high-profile corporate estate. Reporting directly to the Engineering Manager, this role is ideal for a hands-on mechanical expert who excels at technical diagnostics, subcontractor oversight, and statutory compliance management without the burden of line-managing direct reports.

If you take pride in managing pristine plant rooms, ensuring 100% compliance, and working in a well-invested, high-spec environment, this opportunity offers an exceptional platform for professional stability and career growth.

Key Responsibilities

1. Technical Operations & Maintenance Governance

• Mechanical Systems Ownership: Act as the lead mechanical competent person on-site, overseeing the operation and maintenance of business-critical HVAC plant, centralized chillers, VRF/VRV systems, Air Handling Units (AHUs), Fan Coil Units (FCUs), LTHW boilers, pumps, and water services.

• F-Gas Governance: Take full accountability for F-Gas compliance across all refrigeration and cooling assets, ensuring logbooks, leak checks, and refrigerant recovery registers are kept 100% accurate and audit-ready.

• Subcontractor Management: Coordinate and oversee specialist supply chain partners for hard services, annual maintenance, statutory inspections, and reactive call-outs. Inspect work quality and verify completion against scope.

• Overtime & Call-Out Support: Participate in planned out-of-hours maintenance, building shutdowns, and reactive call-outs as required (generous overtime rates available).

2. Compliance, RAMS & Safety Leadership

• Safe Systems of Work (SSoW): Author, review, and challenge site-specific Risk Assessments and Method Statements (RAMS) for internal tasks and specialist contractors.

• Permit to Work System: Manage and enforce the site Permit to Work (PTW) system for high-risk mechanical, hot works, and pressure system tasks.

• Statutory Compliance & Logbooks: Maintain physical and digital compliance logbooks (including F-Gas, Pressure Systems Safety Regulations [PSSR], ACoP L8 water hygiene, and mechanical statutory testing) in pristine condition.

3. Technical Administration & Client Diplomacy

• Engineering Reporting: Compile concise technical reports, asset deficiency logs, and incident root-cause analyses for the Engineering Manager and client representatives.

• CAFM System Administration: Manage, update, and close out planned preventative maintenance (PPM) and reactive work orders within contractual SLAs using the site tablet system.

Person Specification

Qualifications & Certifications (Essential)

• Refrigeration & Cooling Ticket: City & Guilds 2079 F-Gas Category 1 or NVQ Level 2/3 in Refrigeration & Air Conditioning (Mandatory).

• Mechanical Apprenticeship / Qualification: Completed formal apprenticeship with NVQ Level 3 (or City & Guilds equivalent) in Mechanical Engineering, Heating & Ventilation, or Building Services.

• Water Hygiene: ACoP L8 / Legionella Awareness certification (Desirable).

• Safety Accreditation: IOSH Working Safely or IOSH Managing Safely (Desirable).

Experience & Professional Attributes

• Proven Track Record: Demonstrable experience working as a Senior Mechanical Engineer, Mechanical Lead, or Mechanical Supervisor within a high-spec commercial office or corporate estate.

• Compliance IQ: In-depth knowledge of statutory building regulations, F-Gas legislation, PSSR, and SFG20 maintenance standards.

• System Literacy: Proficient with computerised maintenance management systems (CAFM/CMMS) and standard office software (Word, Excel, Outlook).

What We Offer

• Competitive Base Compensation: Highly competitive salary package reflecting technical expertise.

• Funded Upskilling: Dedicated funding for technical development, including pathways toward Authorised Person (AP) status for Pressure Systems / Mechanical Safety.

If you are a mechanical and refrigeration specialist ready to take ownership of a flagship commercial estate, apply today to arrange a confidential discussion.