Building Systems Maintenance Technicians service integrated systems such as HVAC, electrical, plumbing, and building automation systems. They use diagnostic tools, maintenance equipment, and control systems to perform inspections, troubleshooting, and repairs. Responsibilities include preventive maintenance, fault detection, and system optimization. Work environments include commercial buildings, residential complexes, and industrial facilities. They follow safety standards and maintenance protocols. Their role ensures operational reliability, reduces downtime, and maintains occupant comfort, making them essential in facility management globally.