How to become a diesel or heavy vehicle mechanic in Australia
Diesel and heavy vehicle mechanics keep trucks, buses, trailers and other heavy equipment on the road and working. The work is physical, technical and varied, and it matters to businesses that depend on their vehicles every day: transport, mining, farming, construction and bus operators.
What the job involves
- Servicing and repairing diesel engines, transmissions, brakes, suspension, hydraulics and electrical systems.
- Diagnosing faults with computer-based tools and a good understanding of how systems work together.
- Carrying out safety and roadworthy inspections on heavy vehicles and trailers.
- Working in a workshop, on a customer's site or on the road, depending on the employer.
- Handling heavy parts safely, using hoists, jacks and lifting equipment.
Skills that help
- Mechanical aptitude and an interest in large machinery.
- Strength, fitness and good safety habits for lifting and working at height.
- Willingness to learn electronics and diagnostic software.
- Clear communication with drivers, operators and workshop controllers.
How people get started
- The usual pathway is an apprenticeship leading to a Certificate III in heavy commercial vehicle mechanical technology (or the equivalent in your state or in New Zealand).
- Mobile plant, earthmoving and agricultural machinery have their own related qualifications. Ask employers which they offer.
- Some employers require a car licence, and some require a heavy vehicle licence for moving or road-testing vehicles. Check each job advertisement.
Where the career can lead
- Senior technician or field service technician.
- Workshop supervisor, foreman or fleet maintenance manager.
- Specialist roles in engines, transmissions, hydraulics or emissions systems.
- Working in mining and resources, where roster-based roles are common, or running your own business.
Jobs and pay right now
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Common questions
Is diesel mechanics different from car mechanics?
Yes. The principles are similar, but the vehicles are larger, the systems are heavier duty and the training pathway is different. Some people move between the two with extra training.
Can I work in mining as a diesel mechanic?
Many mining and resources employers hire heavy vehicle and plant mechanics, often on rosters. Requirements differ by employer and location.
More career guides
General guidance only. Training pathways, entry requirements and pay differ between states and employers, so check current details with the employer, your state training authority or an industry training organisation. Last reviewed 12 October 2026.
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