Diesel Mechanic

    Mechanic & Engine Technician

    CIP Name: Diesel Mechanic|CIP Code: 47.0605
    SOC Code: 49-3031

    Apply technical knowledge and skills to repair, service, and maintain diesel engines in vehicles such as automobiles, buses, ships, trucks, railroad locomotives, and construction equipment; as well as stationary diesel engines in electrical generators and related equipment.

    $61K
    Median Salary
    +2.4%
    Job Growth
    2mo-2yr
    Training
    26.5K
    Jobs/Year

    What Diesel Mechanics Do

    Apply technical knowledge and skills to repair, service, and maintain diesel engines in vehicles such as automobiles, buses, ships, trucks, railroad locomotives, and construction equipment; as well as stationary diesel engines in electrical generators and related equipment.

    Common Tasks

    • 1Use handtools, such as screwdrivers, pliers, wrenches, pressure gauges, or precision instruments, as well as power tools, such as pneumatic wrenches, lathes, welding equipment, or jacks and hoists.
    • 2Inspect brake systems, steering mechanisms, wheel bearings, and other important parts to ensure that they are in proper operating condition.
    • 3Raise trucks, buses, and heavy parts or equipment using hydraulic jacks or hoists.
    • 4Adjust and reline brakes, align wheels, tighten bolts and screws, and reassemble equipment.
    • 5Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.

    Types of Diesel Mechanics

    Bus MechanicDiesel MechanicDiesel Technician (Diesel Tech)Fleet MechanicGeneral Repair MechanicHeavy Truck MechanicService TechnicianTrailer MechanicTransit MechanicTruck Mechanic

    Work Environment

    Locations

    • • Fleet maintenance shops
    • • Truck dealerships and service centers
    • • Bus garages and transit depots
    • • Construction and heavy equipment yards
    • • Rail or marine repair facilities

    Schedule

    Most diesel mechanics work a set schedule, but many shops run early, late, weekend, or on-call shifts with high time pressure to keep vehicles in service.

    Physical Demands

    The job is physically hands-on, with lots of standing, bending/twisting, kneeling, and frequent handling of heavy parts and tools. Work often involves repetitive motions and using jacks, hoists, and power tools in tight or dirty environments.

    Salary & Job Outlook

    Median $60,640
    $41,683$85,987+
    Entry Level
    10th percentile
    $41,683
    Early Career
    25th percentile
    $49,254
    Median
    50th percentile
    $60,640
    Experienced
    75th percentile
    $73,694
    Top Earners
    90th percentile
    $85,987+

    National Employment: 319,900 jobs

    Top Paying States

    Why Demand May Grow

    Freight shipping, public transit, and construction rely heavily on diesel-powered trucks, buses, and equipment that require ongoing maintenance and repair. Aging fleets and stricter emissions and safety requirements can also increase the need for skilled diesel technicians.

    Skills You'll Need

    Mechanical aptitudeDiesel engine diagnostics and troubleshootingUsing hand and power tools safelyReading gauges, service manuals, and repair specsAttention to detail and safety mindsetPhysical stamina and coordinationProblem-solving under time pressureClear communication with drivers and supervisors

    Pros & Cons

    Pros

    • Steady demand from fleets that must stay on the road
    • Good pay potential with experience and specialization
    • Hands-on work with clear problem-solving outcomes
    • Opportunities in many industries (trucking, transit, construction)
    • Skills can transfer to multiple types of equipment

    Cons

    • Physically demanding with risk of strains and injuries
    • High time pressure to minimize vehicle downtime
    • Exposure to noise, fumes, grease, and harsh weather in some roles
    • May require shift work, weekends, or emergency call-outs
    • Ongoing need to keep up with new diagnostics and emissions systems
    FAQ

    Common Questions About the Diesel Mechanic Trade

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