Skill in installing, operating, inspecting, troubleshooting, maintaining, repairing, and modifying generators, automatic transfer switches, and uninterruptible power systems; and in maintaining, overhauling, repairing, and reconditioning internal combustion engines, diesel, gasoline and gas turbine compressors. Inspects, troubleshoots, calibrates, installs, tests, repairs, removes, aligns, modifies, overhauls and performs major maintenance on complex powered and non-powered aerospace ground support systems and integrated sub-systems to include Nuclear Certified Equipment (NCE).