Maintain and troubleshoot vacuum chambers, pumps, valves, seals, feedthroughs, gauges, leak-detection systems, power supplies, electron guns, ion sources, substrate heaters, motion systems, mass-flow controllers, process-gas systems, thickness monitors, chillers, and cooling-water systems. Support CNC optical generators, grinders, mills, lapping and polishing machines, centering and edging equipment, MRF systems, precision cleaning systems, slurry and filtration systems, robotics, automation, and metrology-support equipment.