Mechanical Supervisor

Randstad Construction & Property; Greater London; On-site; GBP 54,000 - 66,000; Full time

Benefits offered by this job

Upskilling support

Competitive salary

Job summary

Randstad Construction & Property is seeking an experienced Mechanical Supervisor to oversee HVAC and refrigeration systems for a high-spec corporate estate in Central London. You will be the on-site technical authority, working under the Engineering Manager to ensure flawless operation and regulatory compliance.

The role emphasizes hands-on diagnostics, subcontractor oversight, and RAMS/PTW governance, with generous overtime and a clear pathway toward technical seniority.

Qualifications

• City & Guilds 2079 F-Gas Category 1 or NVQ Level 2/3 in Refrigeration & Air Conditioning is mandatory.
• Completed formal apprenticeship with NVQ Level 3 (or City & Guilds equivalent) in Mechanical Engineering, Heating & Ventilation, or Building Services.
• Water Hygiene certification (ACoP L8) is desirable.
• IOSH Safety accreditation (Desirable).

Responsibilities

• Lead as on-site mechanical authority for HVAC and refrigeration plant operation and maintenance.
• Ensure 100% F-Gas compliance with logbooks, leak checks and refrigerant recovery registers.
• Coordinate and oversee specialist subcontractors for maintenance, inspections, and call-outs.
• Contribute to RAMS, PTW processes, and safety compliance in daily operations.

Skills

HVAC Systems

Refrigeration Systems

Maintenance & Diagnostics

Education

City & Guilds 2079 F-Gas Category 1 / NVQ Level 2/3 Refrigeration & Air Conditioning

NVQ Level 3 in Mechanical Engineering / Heating & Ventilation / Building Services

Water Hygiene (ACoP L8) Certification

IOSH Working Safely / IOSH Managing Safely

Tools

CAFM/CMMS

Job description

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.

Randstad CPE values diversity and promotes equality. No terminology in this advert is intended to discriminate against any of the protected characteristics that fall under the Equality Act 2010. We encourage and welcome applications from all sections of society and are more than happy to discuss reasonable adjustments and/or additional arrangements as required to support your application.

Candidates must be eligible to live and work in the UK.

For the purposes of the Conduct Regulations 2003, when advertising permanent vacancies we are acting as an Employment Agency, and when advertising temporary/contract vacancies we are acting as an Employment Business.