5803 - Heavy Mobile Equipment Mechanic
Federal Occupation Description
Federal Occupation Description
This standard covers nonsupervisory work involved in the maintenance, repair, and modification of heavy duty vehicles and mobile equipment which have utility systems or special hydraulic, pneumatic, mechanical, electrical, or electronic systems, features, or controls designed for such purposes as construction, combat, earth moving, ship loading, firefighting, and comparable industrial or special applications. Examples of heavy duty equipment covered by this series include bulldozers, road graders, crawler tractors, power shovels, locomotives, combat tanks, cranes, large missile transporters, and fire trucks. The repair of major systems (such as diesel, gasoline, multifuel, and turbine engines; automatic, standard, and cross-drive transmissions; heavy duty drive line systems; and hydraulic, electrical, and mechanical utility systems) is included, whether accomplished as part of or apart from repair of the total piece of heavy mobile equipment involved. The work requires knowledge of how heavy duty machinery, engines, parts, and systems work; ability to detect faulty items, determine causes of malfunction, and determine best repair methods; and skill to assemble, disassemble, repair, or modify components and systems.
For job opportunities in this series, go to the Office of Personnel Management USAJOBS website.
Other Federal Occupations
It is not uncommon for individuals in one federal occupational series to perform duties related to another series within the same federal occupational group. To find out about the certifications for another series in the TRANSPORTATION/MOBILE EQUIPMENT MAINTENANCE FAMILY, click on that series below. Note that credentials have not yet been identified for all series – links are provided only to those series for which the identification of credentials has been completed. Additional series will be added over time.
- 5806 - Mobile Equipment Servicing
- 5823 - Automotive Mechanic
- 5876 - Electromotive Equipment Mechanic

The following certifications have been identified as most relevant to the broad duties of this federal occupational series. Please note that these credentials may not reflect all of the unique job functions that you perform within your organization. Also these credentials may require additional education, training or experience. For more information about any credential, click on the credential title below.
Compare | Credential | Agency | Related As | GI Bill® | Accreditation | ID | |
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Certified Master Medium-Heavy Truck Technicians Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Certified Safety Professional (CSP)
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Board of Certified Safety Professionals (BCSP) | ![]() |
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Certified Master Collision Repair Technicians Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Certified Master Truck Equipment Technician Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Certified Master School Bus Technicians Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Hydraulic Specialist (HS) Is Not In Demand | International Fluid Power Society (IFPS) | ![]() |
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Commercial Driver's License (CDL) Is Not In Demand | United States Department of Transportation, Federal Motor Carrier Safety Administration (FMCSA) | ![]() |
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Certified Master Automobile Technicians Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Undercar Specialist Exhaust Systems (X1) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Electronic Diesel Engine Diagnosis Specialist (L2) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Automobile Service Consultant (C1) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Certified Master Transit Bus Technicians Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Medium/Heavy Truck - Gasoline Engines (T1) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Medium/Heavy Truck - Diesel Engines (T2) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Medium/Heavy Truck - Drive Train (T3) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Medium/Heavy Truck - Brakes (T4) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Medium/Heavy Truck - Suspension and Steering (T5) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Medium/Heavy Truck - Electrical/Electronic Systems (T6) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Medium/Heavy Truck - Preventive Maintenance Inspection (PMI) (T8) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Truck Equipment - Installation and Repair (E1) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Truck Equipment - Electrical/Electronic Systems Installation and Repair (E2) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Truck Equipment - Auxiliary Power Systems Installation and Repair (E3) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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School Bus Technician - Body Systems and Special Equipment (S1) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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School Bus Technician - Diesel Engines (S2) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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School Bus Technician - Drive Train (S3) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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School Bus Technician - Brakes (S4) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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School Bus Technician - Suspension and Steering (S5) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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School Bus Technician - Electrical/Electronic Systems (S6) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Transit Bus - Compressed Natural Gas (CNG) Engines (H1) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Transit Bus - Diesel Engines (H2) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Transit Bus - Drive Train (H3) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Transit Bus - Brakes (H4) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Transit Bus - Suspension and Steering (H5) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Transit Bus - Electrical/Electronic Systems (H6) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Transit Bus - Preventive Maintenance and Inspection (PMI) (H8) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Parts Specialist - Medium/Heavy Truck Parts Specialist (P1) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Parts Specialist - Automobile Parts Specialist (P2) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Parts Specialist - General Motors Parts Consultant (P4) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Certified Vibration Analyst - Category I Is Not In Demand | Vibration Institute | ![]() |
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Associate Safety Professional (ASP)
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Board of Certified Safety Professionals (BCSP) | ![]() |
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Certified Vibration Analyst - Category II Is Not In Demand | Vibration Institute | ![]() |
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Master Medium-Heavy Vehicle Technician Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Auto Maintenance and Light Repair Certification Test (G1) Is Not In Demand | National Institute for Automotive Service Excellence (ASE) | ![]() |
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Fire Apparatus Technician Level I Is Not In Demand | EVT Certification Commission Inc. (EVT) | ![]() |
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Fire Apparatus Technician Level II Is Not In Demand | EVT Certification Commission Inc. (EVT) | ![]() |
State Licenses
Some states have specific licensing requirements for the following related civilian occupations. These state licenses may require additional education, training or experience. Click on the occupation below to get more information on state requirements from the U.S. Department of Labor.
- Automotive Master Mechanics
- Automotive Specialty Technicians
- Bus and Truck Mechanics and Diesel Engine Specialists
- Engine and Other Machine Assemblers
- Farm Equipment Mechanics and Service Technicians
- Industrial Machinery Mechanics
- Maintenance and Repair Workers, General
- Operating Engineers and Other Construction Equipment Operators
- Transportation Vehicle, Equipment and Systems Inspectors, Except Aviation
Related Civilian Private Sector Occupations
The following civilian private sector occupations are similar to the duties performed by 5803 - Heavy Mobile Equipment Mechanic. These occupations may require additional education, training or experience. For more information about these occupations, click on the civilian occupation below.
Civilian Job | Duties Matched | Bright Outlook | Registered Apprenticeship | Local Salary Info | |
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Automotive Master Mechanics |
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Automotive Specialty Technicians |
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Bus and Truck Mechanics and Diesel Engine Specialists |
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Electrical and Electronics Installers and Repairers, Transportation Equipment |
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Engine and Other Machine Assemblers |
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Farm Equipment Mechanics and Service Technicians |
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Industrial Machinery Mechanics |
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Maintenance and Repair Workers, General |
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Mobile Heavy Equipment Mechanics, Except Engines |
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Operating Engineers and Other Construction Equipment Operators |
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Rail Car Repairers |
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Transportation Vehicle, Equipment and Systems Inspectors, Except Aviation |
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