London-based Lead Building Services Engineer (Mechanical)

TSSI; Acton; On-site; GBP 48,000 - 60,000; Full time

Job summary

TSSI is seeking a Building Services Engineer (Mechanical bias) to lead the mechanical engineering function across London sites. You will manage HVAC systems, boilers, AHUs, pumps, and associated plant, coordinating with electrical, BMS, and fabric teams to ensure reliable, compliant operation.

The role calls for experience in mechanical building services, strong fault-finding, and leadership of in-house engineers and contractors. A relevant qualification and UK driving licence are preferred.

Qualifications

• Recognised mechanical engineering qualification in Building Services or related discipline.
• Extensive experience maintaining mechanical building services in commercial, industrial, or institutional settings.
• Strong knowledge of HVAC, heating, cooling, and ventilation systems.
• Experience managing engineering teams and/or contractors.
• Sound understanding of statutory compliance (L8, F-Gas, pressure systems).
• Familiarity with BMS and maintenance management systems.

Responsibilities

• Manage operation, maintenance, and performance of mechanical building services (HVAC, boilers, AHUs, pumps).
• Oversee PPM schedules, reactive maintenance, and contractor coordination.
• Review plant performance data to identify inefficiencies and improvements.
• Ensure compliance with Health & Safety and statutory duties.
• Manage mechanical maintenance budget, reporting, and procurement support.
• Lead on-call/emergency response for mechanical plant issues.

Skills

HVAC knowledge

Leadership

Fault-finding

BMS knowledge

Contractor management

Education

HNC/HND or Degree in Building Services/Mechanical Engineering

Tools

Building Management Systems (BMS)

CAF/M CMMS systems

Job description

TSSI is seeking a Building Services Engineer (Mechanical bias) to lead the mechanical engineering function across London sites. You will manage HVAC systems, boilers, AHUs, pumps, and associated plant, coordinating with electrical, BMS, and fabric teams to ensure reliable, compliant operation.

The role calls for experience in mechanical building services, strong fault-finding, and leadership of in-house engineers and contractors. A relevant qualification and UK driving licence are preferred.