Assembles mechanical units, fabricated parts/components and/or electrical/electronic systems to make sub-assemblies, assemblies or complete units using hand tools, power tools, jigs, fixtures, and miscellaneous equipment. Installs, modifies, moves, troubleshoots, repairs, overhauls, and dismantles machinery and equipment according to established documentation (e.g., SOPs), layout plans, blueprints, operating or repair manuals, rough sketches, or other drawings.