Should be knowledgeable in the safe and proper use of the following tools: ladders, lifts, basic hand tools, voltmeter, manual drain auger, plumbers helper, safety goggles, ear protection, and fire extinguisher. Monitoring operation and maintaining refrigeration, water cooling and air conditioning equipment, boilers, heating, ventilating and hot water equipment, pumps, valves, piping and filters, other mechanical and electrical equipment.