Mechanical Building Services Engineer

BGIS; Croydon; On-site; GBP 42,000 - 56,000; Full time

Job summary

BGIS is seeking a Mechanical Building Services Engineer to join our team in Croydon. You will deliver PPM and reactive maintenance across mechanical building services, ensuring safe, compliant, and efficient operations in a client-facing environment.

The role covers HVAC, pumps, piping, water services and associated plant, with responsibilities for fault finding, repairs, and continuous improvement. Strong knowledge of health and safety and CAFM experience preferred.

Qualifications

• Recognised mechanical or plumbing apprenticeship, NVQ Level 3, City & Guilds, or equivalent qualification.
• Proven experience within commercial building services maintenance.
• Strong fault-finding and problem-solving skills across mechanical plant and equipment.

Responsibilities

• Carry out planned preventative maintenance (PPM) on mechanical building services plant and equipment.
• Undertake reactive maintenance and fault-finding activities on building services systems.
• Maintain and repair mechanical systems including HVAC equipment, pumps, pipework, water services, heating systems, and related plant.
• Monitor plant performance and identify areas for improvement and energy efficiency.

Skills

Fault finding

HVAC knowledge

Safety compliance

Communication skills

Problem solving

Teamwork

Education

NVQ Level 3

City & Guilds

Tools

Maximo

Concept

Job description

Mechanical Building Services Engineer
Location: Croydon

We are seeking a Mechanical Building Services Engineer to join our team in Croydon. The successful candidate will be responsible for delivering planned preventative maintenance (PPM), reactive maintenance, fault finding, and repairs across a range of mechanical building services systems. The role requires a strong understanding of commercial building services, with a focus on maintaining safe, efficient, and compliant operations within a customer-facing environment.

Key Responsibilities

• Carry out planned preventative maintenance (PPM) on mechanical building services plant and equipment in accordance with maintenance schedules and statutory requirements.
• Undertake reactive maintenance and fault-finding activities on building services systems, ensuring minimal disruption to operations.
• Maintain and repair mechanical systems including HVAC equipment, pumps, pipework, water services, heating systems, pressurisation units, expansion vessels, and associated plant.
• Perform minor plumbing works, including repairs to sanitaryware, pipework, valves, and water systems.
• Monitor plant performance and proactively identify areas for improvement, reliability enhancement, and energy efficiency.
• Ensure all plant faults and defects are diagnosed and rectified promptly.
• Support the operation and monitoring of Building Management Systems (BMS) where required.
• Liaise with specialist subcontractors and supervise their activities on site to ensure compliance with site requirements and safe systems of work.
• Administer contractor permits, work approvals, and safe isolation procedures where required.
• Operate Permit to Work and Lock Out Tag Out (LOTO) systems in line with company and client procedures.
• Ensure all maintenance activities are completed in accordance with Health & Safety legislation and company procedures.
• Prepare and follow suitable Risk Assessments and Method Statements for all tasks undertaken.
• Complete all relevant maintenance documentation and accurately update the Computer-Aided Facilities Management (CAFM) system, ensuring PPM and reactive tasks are closed out promptly.
• Provide material requirements, parts lists, and estimated timescales for remedial works.
• Maintain plant rooms, workshops, and engineering areas in a safe, clean, and orderly condition.
• Build and maintain positive working relationships with colleagues, subcontractors, and client representatives.
• Ensure compliance with contractual KPIs and SLAs.
• Promote a positive safety culture by producing near miss reports, undertaking dynamic risk assessments, and challenging unsafe behaviours where identified.
• Wear company uniform and PPE at all times and maintain a professional image when representing BGIS.
• Support the wider engineering team and undertake any other duties reasonably requested by site management.

Essential Experience & Qualifications

• Recognised mechanical or plumbing apprenticeship, NVQ Level 3, City & Guilds, or equivalent qualification in Mechanical Engineering, Plumbing, or Building Services.
• Proven experience within commercial building services maintenance.
• Strong fault-finding and problem-solving skills across mechanical plant and equipment.
• Good understanding of HVAC systems, heating systems, water services, pumps, and associated mechanical plant.
• Knowledge of health and safety legislation and safe systems of work.
• Experience using CAFM systems such as Maximo, Concept, or similar.
• Ability to work independently and as part of a team.
• Strong communication and customer service skills.

Desirable

• Water Hygiene awareness or L8 experience.
• BMS monitoring experience.
• F-Gas qualification.
• Experience within corporate offices, commercial properties, or critical environments.
• First Aid, IPAF, or PASMA certification.

This role offers an excellent opportunity for a skilled Mechanical Building Services Engineer to join a professional facilities management environment and contribute to the safe and efficient operation of a prestigious site.

At BGIS we believe that diversity and inclusion is a key business driver, such that we never lose sight of its importance as it is woven into the fabric of our organization. We are committed to maintaining a barrier-free recruitment process by providing equal employment opportunities through recruiting and retention of individuals of all backgrounds. We recognize that promoting diversity is an essential component of our continuing pursuit for organisational success! #BGISUK #LI-JC2

Job Info

• Job Identification 233094
• Posting Date 09/15/2026, 02:16 PM
• Job Schedule Full time
• Job Shift Day
• Locations Croydon, Surrey, United Kingdom