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Heavy Mobile Equipment Mechanic
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 grader
What WG-5803 pays
Federal Wage System pay is set by local prevailing wage surveys, so it moves with the wage area rather than a national table.
Wage Grade rates are published per wage area rather than nationally, so the number that matters is the one for the installation you are applying to.
Source: DoD Civilian Personnel Advisory Service wage schedules.
Qualification requirements
OPM's standard for WG-5803, as written.
Heavy Mobile Equipment Mechanic
Federal Wage System Position
Work Performed
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.
Physical Effort
: Heavy mobile equipment repairers at the
What this means if you served
- Write the duties, not the billet. OPM credits military experience on the work performed, and does not use rank or pay to judge specialized experience.
- Put the training and certifications you earned in service on the page. They count here.
- Claim your veterans preference on the application. It is not applied for you.
- No positive education requirement here, so qualifying experience can stand in for the education.
How to qualify for WG-5803
1Review Trade/Craft Requirements
WG positions require demonstrated skill in a specific trade or craft. Review the job announcement for required certifications, licenses, and hands-on experience.
2Document Your Experience
WG positions are experience-based, not grade-based. Document your years of hands-on trade experience, apprenticeships completed, and journeyman status if applicable.
3Gather Credentials
Collect your DD-214, trade certifications (welding, electrical, HVAC, etc.), apprenticeship completion certificates, and any specialized licenses required for your trade.
4Build Your Federal Resume
Two pages, the same USAJOBS limit that has applied since 27 September 2025. Lead with hands-on trade experience: the tools and equipment you ran, safety training, the projects you finished, and hours worked per week.
5Apply on USAJOBS
Search for WG positions in your trade specialty, carefully answer assessment questions about your skill level and experience, and submit before the closing date.
Military jobs that map to this series
Engineer Equipment Mechanic
1142s map directly to WG-5803 Heavy Mobile Equipment Mechanic. Bulldozer, grader, crane, and hydraulic system maintenance translates without friction at NAVFAC, USACE, Marine Corps Logistics Command, and Army Materiel Command depots.
Skills that carry over: Diesel engine repair, Hydraulic system troubleshooting, Heavy equipment overhaul, Electrical system diagnostics, Field maintenance documentation.
Usually opens at: WG-8, WG-9, WG-10, WG-11.
Construction Mechanic
Heavy Mobile Equipment Mechanic. Repair and maintain heavy mobile equipment at federal construction sites and military installations. Same equipment types as NMCB fleet.
Skills that carry over: Heavy equipment repair, Power train systems, Brake systems, Electrical troubleshooting, Field maintenance.
Usually opens at: WG-10, WG-11, WG-12.
Horizontal Construction Engineer
WG-5803 Heavy Mobile Equipment Mechanic is the maintenance lane for 12Ns. Hydraulic systems, undercarriage wear, and field-level repair on dozers, loaders, and graders are direct transfers.
Skills that carry over: Hydraulic systems, Heavy diesel maintenance, Field-level repair, Equipment troubleshooting, PMCS documentation.
Usually opens at: WG-8, WG-9, WG-10.
Your record can qualify you even when your code is not on this list. The crosswalk is a starting point, not the gate.
Typical duties
- Perform heavy mobile equipment mechanic tasks as assigned
- Follow safety procedures and regulations
- Maintain and operate tools and equipment
- Complete work orders and documentation
- Coordinate with team members and supervisors
Key competencies
Ability to follow safety procedures and regulations
Knowledge of tools and equipment for the trade
Skill in performing physical tasks requiring manual dexterity
Ability to work independently and as part of a team
Ability to read and interpret instructions and procedures
Words the announcement will use
Use the ones your record actually supports. A rater is matching your experience against the specialized experience statement, and a keyword with nothing behind it does not survive that.
Questions about WG-5803
What is a Heavy Mobile Equipment Mechanic?
A Heavy Mobile Equipment Mechanic (WG-5803) maintains, repairs, and modifies heavy-duty vehicles and mobile equipment with specialized systems for construction, combat, earthmoving, firefighting, and industrial applications including bulldozers, graders, cranes, and combat vehicles.
How much does a federal Heavy Mobile Equipment Mechanic make?
Federal Heavy Mobile Equipment Mechanics (WG-5803) are paid under the Federal Wage System based on local prevailing rates. Journeyman wages (WG-10/11) typically range $28-$45 per hour. Annual earnings range $58,000-$94,000. Combat vehicle mechanics earn premium rates.
What are the requirements for WG-5803 positions?
WG-5803 requires skill maintaining heavy equipment with hydraulic, pneumatic, mechanical, and electrical systems. Qualifications include engine repair, transmission work, hydraulic system maintenance, and ability to diagnose complex equipment problems.
Can military experience substitute for education in WG-5803?
Absolutely. Military heavy equipment experience directly qualifies. Army 91L (Construction Equipment Repairer), 91A (Abrams Tank System Maintainer), Seabee Construction Mechanics (CM), and any MOS involving heavy equipment repair provides directly relevant experience.
What is the career progression for Heavy Mobile Equipment Mechanic?
Heavy Mobile Equipment Mechanics progress to journeyman (WG-10/11) and lead positions. Career specializations include construction equipment, combat vehicles, or material handling equipment. Supervisor and shop management positions are advancement paths.
How do I apply for WG-5803 jobs on USAJOBS?
Search USAJOBS for 'Heavy Equipment Mechanic' or series '5803.' Positions exist at construction units, depots, and maintenance facilities. Highlight your equipment specializations, certifications, and troubleshooting experience. Veterans receive strong preference.
Ready to apply for WG-5803?
A rater matches your record against the announcement's specialized experience statement, inside two pages. BMR writes that shape from your own experience: competency headers, real scope, hours per week, and the supervisor detail the rater checks.