Supervises the troubleshooting, repair, maintenance and installations of refrigeration systems, coolers, air compressors, Heating, Ventilation and Air Conditioning (HVAC) systems and apparatus, basic maintenance, repairs and installations tools and equipment, as well as maintain, replace, build, adjust and modify the facilities, buildings and the grounds according to a set schedule and in emergency and non-emergency situations. Performs the troubleshooting, repair, maintenance and installations of refrigeration systems, coolers, air compressors, Heating, Ventilation and Air Conditioning (HVAC) systems and apparatus, Performs maintenance, repairs and installations on various equipment.