Repairing and maintaining critical patient care and support systems, including medical and dental air compressors and vacuum pumps, circulating pumps, and hydraulic pump systems (packing, sleeves, bearings, seals, rods, rings, impellers); troubleshooting and repairing automatic doors, fire door closers, and roll-up doors and related hardware. Diagnosing and troubleshooting equipment and support system problems, including microprocessor-controlled equipment, electronic scales, electronic beds, mattress controls, nurse call systems, electronic exam tables/chairs, surgical tables, patient lifts, medical/lab sterilizers, therapy equipment, and mechanical/electronic stretchers.