Location
South Mimms
Industry sector
Engineering
Job type
Permanent | Full Time
Job start date
05/07/2026
Posted date
09/06/2026
Closing date
07/07/2026
Mechanical Engineering Supervisor (Steam & Mechanical Plant)
Location: South Mimms, Hertfordshire
Hours: Monday to Friday, 8:00am – 5:00pm
Overtime: Weekend overtime available for steam checks and operational requirements
About the Rolegeneration and associated mechanical plant systems at a major new development in South Mimms.
This is a hands-on supervisory role responsible for ensuring all plant and equipment are operated safely, efficiently, and in compliance with statutory regulations, site procedures, and contractual performance standards. The successful candidate will play a key role in delivering planned preventative maintenance, reactive maintenance, statutory compliance, and operational continuity across the site.
Key Responsibilities
- Operate and monitor steam boilers, calorifiers, pressurisation units, pumps, valves, pipework systems, and associated mechanical plant.
- Carry out daily plant inspections and record operational readings.
- Monitor steam pressures, temperatures, water levels, and overall plant performance.
- Ensure the safe and efficient operation of all steam and heating systems.
Planned Preventative Maintenance (PPM)
- Deliver maintenance activities in line with the Annual Planned Maintenance Schedule.
- Complete maintenance tasks in accordance with manufacturer recommendations, statutory requirements, and industry best practice.
- Replace consumables and minor components as required.
- Maintain accurate service records, maintenance documentation, and compliance reports.
Reactive Maintenance
- Respond to plant breakdowns, system faults, alarms, and emergency callouts.
- Diagnose and rectify mechanical and steam system faults efficiently.
- Undertake repairs and minor remedial works.
- Escalate significant defects, risks, or operational concerns to management.
Health, Safety & Compliance
- Ensure compliance with:
- Pressure Systems Safety Regulations (PSSR)
- Health & Safety at Work Act
- Permit-to-Work procedures
- Lock Out / Tag Out (LOTO) systems
- Participate in risk assessments and safe systems of work.
- Maintain clean, safe, and compliant plant room environments.
- Support a strong safety culture across the site.
Essential Qualifications & Experience
- NVQ Level 3 / City & Guilds in Mechanical Engineering, Building Services, or equivalent.
- BOAS (Boiler Operation Accreditation Scheme).
- Gas Safe Registered with:
- CODNCO1 – Commercial Catering / Direct Fired Appliances
- CIGA1 – Indirect Fired Heating Appliances
- CDGA1 – Direct Fired Heating Appliances
- TPCP1 / TPCP1A – Testing and Purging Commercial Pipework
- Proven experience operating and maintaining commercial steam systems.
- Strong knowledge of boiler plant and pressure systems.
- Experience with:
- PSSR regulations
- Safe isolation procedures
- Permit-to-Work systems
- CAFM systems
- Background within commercial building services or facilities management environments.
Desirable Qualifications
- IOSH Working Safely or equivalent.
- Water Hygiene / L8 Awareness.
- HVAC or BMS experience.
- Experience within healthcare, education, research, or large commercial facilities.
Skills & Attributes
- Excellent fault-finding and problem-solving abilities.
- Strong communication and reporting skills.
- Ability to work independently and supervise site activities effectively.
- Good understanding of statutory compliance requirements.
- Ability to prioritise workloads and respond to operational emergencies.
- Professional, proactive, and customer-focused approach.
This role would suit a technically strong mechanical professional with extensive steam plant experience who is looking to take ownership of a critical site operation. You'll be joining a growing development where reliability, safety, and high standards of maintenance are essential to success.