Federal job category 5800 includes trades focused on the maintenance, repair, and overhaul of transportation and mobile equipment used across federal operations. These roles involve working on vehicles such as trucks, buses, forklifts, construction machinery, fire engines, and combat vehicles. Employees in this category inspect systems, diagnose mechanical issues, replace worn components, and perform preventive maintenance to keep equipment safe, reliable, and mission-ready. The work requires knowledge of engines, transmissions, hydraulics, electrical systems, and specialized auxiliary features.

Most positions fall under the Federal Wage System and are hands-on, often located at military installations, federal motor pools, or depot-level maintenance facilities. Workers may service everything from standard sedans to heavy-duty tactical vehicles, using diagnostic tools, repair manuals, and technical schematics. Whether rebuilding a diesel engine or troubleshooting a hydraulic lift, GS-5800 roles demand mechanical skill, attention to detail, and a strong commitment to operational safety. These jobs are essential to keeping federal fleets and mobile assets functioning under all conditions.