Federal job category 4800 includes trades focused on the maintenance, repair, and adjustment of general-purpose equipment used across federal operations. These roles involve working with a wide range of mechanical systems such as generators, compressors, pumps, heating units, and other utility or industrial machinery. Employees in this category inspect equipment for wear, troubleshoot malfunctions, replace faulty components, and perform routine servicing to ensure safe and efficient operation. The work requires mechanical aptitude, familiarity with technical manuals, and the ability to use diagnostic tools and hand-held instruments.

Most positions fall under the Federal Wage System and are hands-on, often located in military installations, federal buildings, or field service environments. Workers may be responsible for maintaining equipment that supports facility operations, emergency response, or mission-critical systems. Whether servicing HVAC units or repairing hydraulic lifts, GS-4800 roles demand precision, problem-solving skills, and a strong commitment to safety and reliability. These jobs are essential to keeping federal infrastructure and support systems running smoothly.