Perform skilled assembly operations such as: shimming, fitting, trimming and aligning which may vary considerably from one assembly to another as with fairings and the mating of major assemblies; realigning or replacing ribs, bulkheads or stringers in skinned assemblies; establishing from blue-prints with or without firm callouts, butt, center, chord, station and water lines; blind pick up of hole locations for blank parts from existing structure; correcting cans, buckles, wrinkles in outer skins and remove surface defects as assigned. Assemble structures or support equipment structures with or without the aid of jigs and fixtures by drilling, reaming, countersinking, stop countersinking, dimpling as assigned, burring, fastening, filing, filling, fitting, aligning, trimming, shimming and remove surface defects as assigned.