See Heavy Equipment Mechanic 1.

Positions in this level of the series lead lower-level Heavy Equipment Mechanics; OR, is the designated specialist in a geographic region or area performing complex fuel station maintenance and repairs.

As a lead worker, leads others in the performance of heavy (greater than 26,000 GVWR) and construction (on-and off-road) vehicle and equipment mechanic work. Regularly assigns, instructs, and checks the work of assigned lower-level Heavy Equipment Mechanics.


As the designated fuel station specialist, inspects above ground and underground fuel storage tanks and performs ongoing maintenance and repairs of fuel stations.

Leads other mechanics in performing duties on heavy vehicles and equipment working in a shop or in the field; guides diagnostics, disassembly, repair or replacement, and reassembly of units;

Makes or leads emergency field repairs to a variety of specialized equipment and performs inspections on a variety of heavy vehicles and equipment in the field;

Leads the diagnostics, service, and repair of various systems that are found on heavy equipment such as mechanical and computer electronic controls, air brake systems, transmissions, computer controlled automatic and manual transmissions, high voltage generators, propane powered equipment, and pneumatic systems;

Fabricates, modifies, and installs special equipment or replacement parts, or leads others in the performance of fabrication work;

Designs, fabricates, and inspects mechanical apparatus such as truck mounted tanks, battery holders, toolboxes, utility bodies, snowplows and mounting brackets for lights and signs; designs, lays out and orders appropriate materials; welds sections together and mounts apparatus, shields, deflectors, protective and safety access improvements on equipment; calibrates mechanical and computer electronic controls to ensure apparatus operates effectively;

Performs or directs the routine scheduled and unscheduled maintenance checks and adjustments on fluid levels, hoses, belts, brakes, tires, and clutches; changes filters and oil; lubricates vehicles and motor driven equipment;

Tunes gas and diesel engines, services valves, fuel injection systems, fuel pumps, high pressure pumps and carburetors, fuel filters and turbo chargers, and pressure checks fuel filters, adjust injector heights, fuel racks, governors, etc.;

Determines need for repairs or adjustments, and either performs repairs or refers work to another mechanic;

Leads and trains other mechanics in troubleshooting and determining the cause and extent of component or system failure through industry standards of diagnostics or trouble-shooting procedures and logic, test drives, pressure and temperature checks, uses disassembly, inspection, computerized and electronic diagnostic equipment, and reference to technical manuals, blueprints, and schematic manuals;

May coordinate equipment compliance, preparation, repair, and disposal;

Assists supervisor in the initiation, preparation, and maintenance of equipment records;

Repairs, tests, and maintains motor vehicle refueling stations; installs electronic monitoring and refueling systems; integrates new components; tank monitoring and fuel issuing equipment; inspect fuel tanks, repair leaks and conduct site clean-up; troubleshoots card reader and automated fueling problems;

Performs complex fuel station and refueling infrastructure work, or complex and non-routine hydraulics work;

May act in the absence of the supervisor;

Performs other duties as assigned.

Knowledge of: standard practices, materials, tools, and equipment used in the repair and maintenance of motor vehicles and engines; safety issues in the use of tools, equipment, and supplies used in repair of motorized vehicles and equipment; body and frame construction.

Ability to: diagnose mechanical, electrical and hydraulic malfunctions; read manuals and schematics; rebuild engines and major driveline components; communicate with other mechanics about repair work needed; enter repair information in fleet maintenance management software; lead, mentor, assist, train and explain instructions and guidelines to others effectively; organize and coordinate the work of the unit; determine work priorities; assign work to employees.

There may be instances where individual positions must have additional licenses or certification. It is the employer’s responsibility to ensure the appropriate licenses/certifications are obtained for each position.

Fuel specialist positions require ICC code U1 UST (underground storage tank installation and repair), ICC code U5 AST (above ground storage tank installation and repair); and Veeder Root Installer Level 1 UST Monitoring Systems Installation and Repair Levels 1, 2 and 3 certifications or licenses and Washington State Class A UST Operator Training.

Persons legally authorized to work in the U.S. under federal law, including Deferred Action for Childhood Arrivals recipients, are eligible for employment unless prohibited by other state or federal law.

Four years of experience repairing and maintaining heavy equipment. Successful completion of relevant vocational technical training in heavy equipment may substitute year for year for experience. Equivalent training and/or education may substitute for experience.

Some positions may require a Commercial Driver’s License.

Equivalent education/experience.

Establish new job classification; range 63G; adopted June 23, 2025, effective July 1, 2025.