At the direction of the Critical Facilities Manager, maintains, monitors, and performs preventive, predictive, and corrective maintenance on critical equipment, which may include the following: mechanical (including, but not limited to, HVAC, computer room air conditioners, chillers, and plumbing) electrical (including, but not limited to, UPS, DC battery systems, PDU, generators, transfer switches, and switchgear), cabling (including, but not limited to, data and voice, broad band), fire detection and suppression, life safety, lighting, temperature control systems, building management systems, and digital systems (including fire alarm, duress, card access, CCTV). The CET also, monitors operation, adjusts, and maintains refrigeration, chilled water, and air conditioning equipment; boilers, and ventilating and hot water heaters; pumps, valves, piping and filters; other mechanical and electrical equipment; record readings and adjust where necessary, through controlled measures, to ensure proper operation of equipment.