Federal job category 3800 covers trades involved in shaping, assembling, and repairing metal components used in federal equipment, structures, and systems. These roles include Sheet Metal Mechanics, Welders, and Metal Fabricators who work with materials like steel, aluminum, and copper to build or restore items such as ducts, enclosures, panels, and structural supports. Employees in this category use tools like shears, brakes, welding torches, and grinders to cut, bend, join, and finish metal parts according to detailed specifications. The work demands precision, craftsmanship, and a solid understanding of metalworking techniques.

Most positions fall under the Federal Wage System and are hands-on, often located in military depots, shipyards, or maintenance facilities. Workers interpret blueprints, measure and mark materials, and ensure that finished products meet strength and durability standards. Whether fabricating aircraft components or repairing facility infrastructure, GS-3800 roles require technical skill, physical stamina, and attention to safety. These jobs are essential to maintaining the structural integrity and operational readiness of federal assets.