A Diesel Fitting Apprenticeship will prepare you for a job where you will repair, service and maintain diesel machinery, plant equipment, engines and heavy vehicles. This often involves diagnosing issues with parts and systems that require a new part to re-crafted to ‘fit’ the repair. Diesel Fitters will often work alongside or in a similar capacity as Heavy Vehicle Mechanics. Diesel Fitters are specialists in diesel engines and the connected systems, where as a mechanic might also carryout works on other areas of the vehicles, such as the electrical or HVAC systems.

Depending on their on-the-job training a Diesel Fitter will specialise in particular machinery, plant equipment or engine types particular to their industry; this could be the machinery and plant equipment essential to open-cut-mining operations, or the machinery and engines used in heavy agriculture industries.

This trade requires a four-year apprenticeship. MIGAS will facilitate your practical work placement with one of our quality host employers. In addition to on-the-job training, we will assist you with enrolment through a Registered Training Organisation to complete your certification. With MIGAS you will be fully supported throughout the duration of your placement by a Field Officer and by the wider MIGAS Apprentices and Trainees community.

A day on the job in Diesel Fitting

Use diagnostic equipment such as computers to detect faults
Dismantle, replace and assemble engineering components
Maintain fluid power systems for mobile plant machinery
Maintain engine cooling systems and induction/exhaust systems
Test compression ignition fuel systems and tune diesel engines
Dismantle, clean and assess parts as part of an engine bottom-end overhaul
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Skill Requirements for success in Diesel Fitting Apprenticeships

  • Practical and manual work
  • Mechanical aptitude
  • Good math, science and computing skills
  • Diagnostic ability


  • Certificate III in Engineering – Mechanical Trade (Diesel Fitting)
  • Certificate III in Automotive Diesel Engine Technology (Diesel Fitting)

Available Apprenticeships

Automotive Parts Interpreter Apprenticeship

Acacia Ridge, QLD | JOB ID 5903

We have an outstanding opportunity to become a qualified automotive parts interpreter and gain a nationally recognised qualification

Heavy Commercial Vehicle Mechanic Apprenticeship

Willawong, QLD | JOB ID 5881

Looking for a Heavy Vehicle Mechanic Apprenticeship? We have 2 roles working on road transport vehicles available now