Diesel Technician

A diesel technician diagnoses, services, and repairs diesel engines and fuel systems in heavy vehicles, plant machinery, and industrial equipment across Australian worksites and workshops. They use diagnostic tools and technical knowledge to identify mechanical and electrical faults, perform preventive maintenance, and restore equipment to safe working condition in compliance with Australian vehicle standards and workplace safety regulations.

Diagnose diesel engine faults using compression testers, borescopes, and electronic diagnostic scanners to identify mechanical or fuel system defects. Service diesel engines by replacing filters, oils, coolant, and belts according to manufacturer specifications and maintenance schedules. Repair fuel injection systems including injectors, fuel pumps, and high-pressure common rail components using specialised tools and test equipment. Overhaul engine components such as pistons, cylinders, and gaskets following technical manuals and precision measurement standards. Test electrical systems and alternators on diesel engines using multimeters and load testing equipment to diagnose charging or starting issues. Repair hydraulic systems integrated with diesel-powered machinery, including hoses, pumps, and cylinders. Perform pre-start safety inspections and load testing on repaired diesel engines to ensure compliance with Australian Design Rules and workplace safety requirements. Maintain detailed service and repair records including parts used, labour hours, and test results for equipment documentation and warranty purposes.

The standard entry pathway requires a Certificate IV or Certificate III with at least two years of on-the-job training (ABS skill level 3). Specific qualification requirements vary by employer and state. Some employers may accept equivalent experience. Check yourcareer.gov.au for available courses and dewr.gov.au/skills-reform/free-tafe for subsidised training options.

You'll need a Certificate III or IV in diesel mechanics, which usually takes several years through an apprenticeship. The real grind is that diagnostic work demands precision: one wrong call on a fuel injector or common rail system costs thousands. Physical wear is real too: knees and back take a hit from crawling under heavy machinery. Pay tops out slower than you'd hope for skilled trade work.

Regional Australia has steady demand near farms, quarries, and transport hubs. The work is mostly tied to where heavy vehicles, mining equipment, and industrial machinery operate: rarely remote, mostly workshop-based or on-site at worksites.

Published for ANZSCO unit group 3212, the wider group this job sits in, not for this job on its own.

This is the median for full-time employees who are not managers and are paid at the adult rate, before tax and salary sacrifice. It is a guide to what the work pays, not a wage rate.

Source: ABS Survey of Employee Earnings and Hours, May 2025, customised report.

• Active Listeningcore
• Adapt to new technology used in carscore
• Attention to Detailcore
• Car controlscore
• Continuous Learning and Upskillingcore
• Engine componentscore
• Incident Reportingcore
• Maintain vehicle recordscore
• Mechanicscore
• Perform manual work autonomouslycore
• Perform technical tasks with great carecore
• Policy and Procedure Adherencecore
• Problem Solvingcore
• Process Documentationcore
• Quality Assurance and Checkingcore
• Risk Identificationcore
• Team Collaborationcore
• Time Management and Prioritisationcore
• Use automotive diagnostic equipmentcore
• Vehicle electrical systemscore
• Verbal Communicationcore
• Workload Self-Managementcore
• Adaptability and Flexibility
• Apply health and safety standards
• Basic Arithmetic and Numerical Accuracy
• Customer Needs Assessment
• Digital Literacy
• Electrical wiring plans
• Ensure compliance with warranty contracts
• ERP and Inventory Systems
• Execute working instructions
• Invoicing and Billing Administration
• Maintain work area cleanliness
• Provide customer information related to repairs
• Record Management
• Regulatory and Legislative Awareness
• Types of vehicles
• Written Communication

• ABS OSCA 2024, occupation definition and task statements
• ABS Survey of Employee Earnings and Hours, May 2025, customised report.
• ABS, 2021 Census of Population and Housing based on usual place of residence (Custom Report). OSCA Experimental Estimates.

Role data is drawn from official Australian Government sources, and each figure names where it comes from. Where a role is not in the ABS classification, the page shows no government figures for it. Data may not reflect every local variation.

Where our numbers come from.

What Diesel Technician workers move into, from ten years of tax records.

Last updated: 30 October 2026