OCS
Refrigeration & Air Conditioning Engineer
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Lead Refrigeration & Air Conditioning Engineer
Working Days & Hours
Monday to Friday – 08:00 – 17:00
About the Role
We are seeking a highly experienced and technically proficient Lead Refrigeration & Air Conditioning Engineer to join our mobile technical services team. This senior-level role is perfect for a time-served engineer with extensive experience in large-scale refrigeration and HVAC systems, who is also passionate about mentoring and supporting junior engineers.
You will lead by example in delivering advanced technical services, supporting complex installations, and ensuring compliance across a diverse portfolio of commercial sites. You will also play a key role in knowledge sharing, technically leadership, and continuous improvement within the team.
Key Responsibilities
Technical Leadership & Mentorship
- Provide technical leadership and mentoring to junior and mid-level engineers.
- Support training and development initiatives, including on-the-job coaching and technical troubleshooting guidance.
- Act as a point of escalation for complex technical issues and assist in root cause analysis and resolution.
Advanced Service & Maintenance
- Lead planned and reactive maintenance, servicing, and repairs across:
- Large-scale VRV/VRF systems
- Central plant refrigeration systems
- Chillers, cold rooms, and multi-compressor systems
- Advanced AHUs, heat pumps, and integrated HVAC systems
- Diagnose and resolve faults across electrical, mechanical, and refrigerant systems, prioritising long-term reliability and performance.
Compliance & Quality Assurance
- Ensure all works meet or exceed F-Gas & ODS regulations, technical standards, and manufacturer specifications.
- Conduct quality audits and support continuous improvement in service delivery and compliance.
- Promote and enforce safe working practices across all operational activities.
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Documentation & Reporting
- Review and validate service documentation, inspection reports, and remedial work records.
- Provide technical feedback and improvement suggestions to internal teams and clients.
- Utilise digital tools (PDA/mobile apps) to manage workflow, reporting, and communications.
Client Engagement & Collaboration
- Build strong client relationships, offering expert advice and reassurance.
- Collaborate with internal teams for project planning, mobilisation, and service enhancements.
- Represent the technical team in client meetings and site reviews where required.
Emergency Support & Escalation
- Participate in the emergency on-call rota for senior-level support during critical incidents.
- Lead or support emergency response efforts, ensuring rapid resolution and minimal disruption.
Requirements
- Time-served apprenticeship in Refrigeration/Air Conditioning
- City & Guilds Level 3 NVQ or equivalent in HVAC, Refrigeration or Mechanical Engineering
- F-Gas & ODS Regulations (Category 1 – 2079)
- Minimum 5–10 years of hands-on experience in commercial HVAC/R systems
- Proven experience with large-scale refrigeration systems and central plant equipment
- Strong understanding of Health & Safety legislation and Permit to Work systems
- Experience mentoring or supervising engineering teams
- Exceptional fault-finding and diagnostic skills
- Proficient in digital reporting tools and mobile apps
- Strong communication and leadership skills
- Full UK driving licence
About the Company
OCS UK & Ireland is one of the leading facilities management companies, employing 50,000+ colleagues with a turnover exceeding £2bn. We deliver innovative, award-winning services in facilities management, hard services, cleaning, security, and catering.
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Our mission is to "make people and places the best they can be" for our colleagues, customers, and the communities we serve. Our commitment to ethical business practices is rooted in our TRUE values: Trust, Respect, Unity, and Empowerment.
Why Work for OCS?
✅ Award-Winning Employer Ranked 36th on Glassdoor’s Best Companies to Work For (2025)—We value and empower our people.
🚀 Digital Learning The OCS Academy provides online courses and resources to help you build skills and advance your career.
🙂 Retail & Wellbeing Perks Access exclusive discounts, rewards, and wellbeing resources via our Hapi app.
📝 Professional Growth Over 600+ live learners in the UK & Ireland, supporting colleagues in gaining how calculations and technical qualifications.
💰 Flexible Pay Gain access to earned wages via our Wagestream app before payday (contract-specific).
How to Apply
If you’re interested in joining an organisation that fosters professional development, career progression, and collaboration, please click apply and register your interest. You can also sign up for job alerts to receive notifications about suitable vacancies.
We are an equal opportunities employer and value a diverse workforce with varied knowledge, skills, and backgrounds to achieve our goals. We offer an inclusive and welcoming workplace and actively encourage applications from all individuals regardless of race, gender, nationality, religion, sexual orientation, disability, or age.
(Note: Minor typographical corrections made for clarity while preserving original intent.)
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