Performs troubleshooting and maintenance duties related to plumbing such as but not limited to: repair and maintenance of faucets, opening plugged drains, replacing worn or damaged traps, repairing steam system components, tightening loose packing, repairing flush valves, replacing worn or damaged commode seats, etc. Performs troubleshooting and maintenance duties related to mechanical equipment systems such as installing parts in mechanical apparatuses, repairing condensing and chilled water pumps, repairing air handling and cooling tower equipment, packing, lubricating, and replacing bearings, gear boxes, pulleys, etc.