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Jobs & PathwaysUpdated September 2026

Diesel mechanic apprenticeship pathway

Quick answer

Do a four year apprenticeship with a workshop or through a group training organisation, completing the AUR31120 Certificate III in Heavy Commercial Vehicle Mechanical Technology (trucks and buses) or AUR31220 Certificate III in Mobile Plant Technology (mining and earthmoving gear) at TAFE while you work. You can start from school, via a school based apprenticeship, or as an adult.

There is no university and no licence exam in this trade: the pathway is employment plus training. You sign a training contract with an employer, work full time in the workshop, and complete a nationally recognised Certificate III through TAFE or a private RTO in blocks or day release. The decisions that actually matter are which stream you pick (heavy commercial vehicle or mobile plant), who employs you (a local workshop, a dealer, a GTO or a mining company) and where you want to end up, because transport, ag and mining are different lives.

The qualification

The truck and bus stream is the AUR31120 Certificate III in Heavy Commercial Vehicle Mechanical Technology, current on training.gov.au: 36 units (22 core plus 14 electives) covering diesel engines, air brakes, steering and suspension, driveline, hydraulics, electrical systems and diagnostic strategy. Nominal duration is four years as an apprenticeship, and most awards allow competency based progression so strong apprentices can move through pay levels, and sometimes finish, faster.

There are no licensing or entry requirements attached to the qualification itself. Entry is simply getting an employer to take you on.

Heavy commercial vehicle vs mobile plant

The sister qualification is the AUR31220 Certificate III in Mobile Plant Technology (also current), aimed at excavators, dozers, loaders, haul trucks and other off road machinery. Mining companies and earthmoving dealers typically train their apprentices under it: Rio Tinto's heavy duty diesel fitter apprenticeship, for example, delivers the Mobile Plant qualification.

Do not stress too hard about picking wrong. The core skills (diesel engines, hydraulics, electrical, diagnosis) overlap heavily, and qualified people cross between trucks and plant all the time. Pick the stream that matches the employer you can actually get, then steer your career later.

Ways in

  • Straight to an employer: apply to truck dealers, transport fleets, bus companies, plant hire firms, mining contractors and ag machinery dealers, and do it early because big employers recruit apprentices months ahead
  • Pre apprenticeship: a short Certificate II automotive course at TAFE before you apply. Not compulsory, but it proves you are serious and Rio Tinto and others list it as an advantage
  • School based apprenticeship: in NSW for example you start the apprenticeship in years 11 and 12, part time around school with a minimum of about 130 days of paid work, earn HSC credit, then convert to full time after school and finish in roughly three more years. Other states run similar schemes
  • Group training organisation (GTO): the GTO employs you, sorts your pay, training contract and TAFE, and places you with host workshops. Good if you cannot land a direct role, and rotation between hosts broadens your experience
  • Mining company intakes: the majors and big contractors run structured apprentice programs, some FIFO from capital cities and regional hubs, with employer supplied gear and mentoring. Competitive, so treat the application like a job interview from day one
  • Adult apprentices: starting at 21 or older is common in this trade and attracts higher award pay rates. Relevant experience (farm hand, truck driving, labouring in a workshop) can sometimes earn credit toward the apprenticeship

TAFE plus on the job

Training runs in parallel: most of your learning happens in the workshop under tradespeople, and the formal units get delivered and assessed by TAFE or an RTO in block release (a week or more at a time, common for regional and mining apprentices) or day release. Employers must release you for training and pay you for it as a full time apprentice. Keep your training record up to date, because signed off units are what moves you up pay levels under competency based progression.

Where the work is (and FIFO)

Transport and dealer jobs cluster around cities, freight routes and regional centres. Ag jobs live in country towns and follow the seasons. Mining jobs concentrate in WA, Queensland and the NT plus the big coal and metals regions of NSW and SA, and many are FIFO or DIDO on rosters with camp accommodation and flights included. FIFO apprenticeships exist but plenty of people do their time residentially first and go FIFO once qualified, when the pay premium is biggest. Think honestly about roster life before you chase it: the money is real, and so is the time away.

Honest first year expectations

First year is services, cleaning, fetching and watching, on apprentice wages set by your award or agreement, your year and your age (use the Fair Work Pay and Conditions Tool for your actual rate). The learning curve is steep, the gear is heavy and the hours can stretch in harvest or breakdown season. Stick at it: the work gets better fast, the trade is in genuine shortage, and by the time you are qualified you hold a ticket that is wanted in every state and pays extremely well in the right seat.

Keep reading: Jobs & Pathways

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How to get an apprenticeshipDo a pre-apprenticeship or some work experience, put together a simple one-page resume, then attack it from several angles at once: ring and doorknock local employers, register with a Group Training Organisation (GTO), and get a free Apprentice Connect Australia provider working for you. If you want a big employer like a utility or tier-one builder, watch their annual intake window, because applications often open a full year before the January start.Pre-apprenticeships explainedA pre-apprenticeship is a short TAFE or RTO course (usually a Certificate II, three months to two years) that gives you basic trade skills, a White Card and some work placement before you commit to a full apprenticeship. You are a student, not a paid employee. In some trades, especially electrical, it is close to a hiring requirement; in others, like carpentry and automotive, plenty of employers take people on with no pre-app at all.Apprenticeship resume templateKeep an apprenticeship resume to one page: contact details, a short intro, education (including your maths level), any work experience, tickets and licences like the White Card and your driver's licence near the top, and two referees. Then get it in front of people: plenty of apprenticeships are won by phoning builders and handing printed copies over on site, not just emailing PDFs to job ads.Common apprenticeship interview questionsMost apprenticeship interviews focus on why you want the trade, whether you will turn up reliably, and whether you can take direction and handle the physical and safety side of the job. Bigger employers and group training organisations often add a literacy and numeracy aptitude test or a paid trial day on top of the chat. Answer honestly, do a bit of homework on the business, and have questions ready about pay, tools and how your training will run.

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General guidance only
Answers here are general guidance to point you in the right direction - always check official sources and ask your supervisor for your specific situation.