Electrical contracting; Elevator installation and repair; HVAC contractor services; Installation and maintenance of fire alarm, detection and suppression systems; Installation of security systems; Maintenance of HVAC, fire alarm, fire suppression, access control, and security systems

Design and inspection of fire alarm, detection and suppression systems; Monitoring HVAC, fire alarm, fire suppression, access control, and security systems systems to ensure proper functioning; Testing of security systems

Monitoring fire alarms; Monitoring of burglar and security alarms