Heavy Diesel Mechanics
Certified Heavy Diesel Mechanic & Maintenance Specialist
Become a Heavy Diesel Mechanic in Australia
Are you considering a career as a diesel fitter and want to know more about what’s involved? As the bedrock of industries that depend on heavy machinery, diesel fitters are essential for maintaining and repairing the powerful engines that drive the modern world. This career requires a unique combination of technical expertise and practical skills, making it both a challenging and rewarding pursuit. Whether you’re captivated by the intricacies of heavy diesel mechanics or eager to delve into the specifics of diesel fitting, grasping the fundamental responsibilities and qualifications is vital. In this guide, we’ll take you through the steps on how to become a diesel fitter, providing insights and expert advice to set you on the path to success.
On this page
What Does a Heavy Diesel Mechanic Do?
Skills & Qualities You Need to Succeed
How to Become a Heavy Diesel Mechanic
Industry Sectors & Career Opportunities
Salary Expectations & Career Growth in Australia
Join OnShift Workforce by Mechcorp

Heavy Diesel Mechanic
Starting a career as a specialised professional in diesel engine service and repair is rewarding. These engines power heavy machinery and large vehicles, crucial in many industries. Being a Heavy Diesel Mechanic means diving into a world of large-scale power and precision. Unlike general diesel mechanics who might work on light commercial vehicles or small generators, heavy diesel mechanics focus on the giants of the road, sea, and site, think semi-trucks hauling freight across the country, city buses carrying hundreds of passengers, and workboats powering remote offshore rigs. Here’s a glimpse into life in this role:
What Does a Heavy Diesel Mechanic Do?
A heavy diesel mechanic does many things. They find and fix problems in diesel engines and equipment. They also keep and repair diesel engines and other parts of heavy vehicles and machines.
Core Responsibilities and Duties
Heavy duty diesel mechanics have key jobs. They find and fix engine problems, take apart engines, and replace old parts. Their main tasks include:
- Doing regular checks and maintenance on diesel engines and equipment
- Finding and solving issues with special tools and equipment
- Fixing or replacing broken parts
- Rebuilding and fixing engines and transmissions
Types of Machinery & Equipment
Heavy diesel mechanics work with many machines. This includes trucks, buses, and construction equipment. They make sure these machines work well by knowing how different diesel engines and systems work.
Some examples of the machinery and equipment they work with include:
- Heavy-duty trucks and trailers
- Construction equipment like excavators and bulldozers
- Diesel-powered generators and pumps
- Agricultural machinery like tractors and harvesters
Work Environment and Conditions
Heavy diesel mechanics work in workshops or garages. They often work in teams but sometimes alone. The job is hard, requiring lifting heavy tools and parts, working in tight spaces, and dealing with noise and fumes. To do well in this job, you need to be physically strong. You also need to be okay with working in a busy, changing environment.
The Growing Demand for Heavy-Duty Truck Mechanics in Australia
In Australia, the need for heavy duty truck mechanics is increasing. This is because industries like mining, construction, and transportation are getting bigger. These sectors need experts to keep their heavy machinery running smoothly.
The need for heavy diesel mechanics is also rising. They are crucial for keeping heavy vehicles and machinery in top shape. This includes regular checks and complex repairs that need a lot of technical know-how.
Several factors are driving this demand:
- The mining industry is growing, needing more maintenance for heavy machinery.
- Construction projects are increasing, requiring reliable heavy equipment.
- The transportation sector is expanding, relying on heavy trucks and vehicles.
There are many job openings for those who are qualified as heavy duty truck mechanics. With the right training, you can start a fulfilling career in this field.
Working as a heavy duty truck mechanic in Australia has its perks:
- You can earn a good salary.
- There are chances for career growth.
- It’s a secure job due to the constant need for skilled workers.
Knowing about the increasing need for heavy duty truck mechanics helps you make better career choices. It lets you take advantage of the opportunities in this field.
Essential Skills and Qualities for a Heavy Diesel Mechanics
To be a top heavy diesel mechanic in Australia, you need certain skills and qualities. The job requires technical knowledge, physical strength, and problem-solving skills. These are needed to fix complex mechanical problems.
Technical Skills Required
A heavy diesel mechanic must know a lot about diesel engines, hydraulics, and electronics. They should be good at using tools like multimeters and diagnostic software.
Some key technical skills include:
- Understanding diesel engine parts and systems
- Knowing how hydraulic and pneumatic systems work
- Understanding electrical systems and circuits
- Being skilled with diagnostic tools and software
Physical Requirements
The job of a heavy diesel mechanic is tough. It needs stamina and strength to work quickly. Mechanics often lift heavy tools and stand for long times.
To handle these physical demands, heavy diesel mechanics should:
- Be physically fit and have good endurance
- Have good hand-eye coordination and dexterity
- Be comfortable in different environments and condition
Problem-Solving Abilities
Heavy diesel mechanics need to solve problems well. They must find the root cause of complex issues and fix them.
To be good at solving problems, heavy diesel mechanics should:
- Use a logical and methodical approach
- Be able to analyse data and understand results
- Keep up with new technologies and techniques
Education Pathways to Become a Heavy Diesel Mechanic
There are many ways to become a heavy diesel mechanic in Australia. You can choose from formal education or practical training.
To do well in this job, you need the right skills and knowledge. You can get these by taking a course or getting a qualification in heavy diesel mechanics.
TAFE Courses and Qualifications
TAFE offers special courses for heavy diesel mechanics. These courses teach you how to fix engines, work on electrical systems, and more.
Some top TAFE qualifications include:
- AUR30620 Certificate III in Heavy Vehicle Mechanical Technology
- AUR40216 Certificate IV in Automotive Mechanical Diagnosis
Apprenticeship Programs
Apprenticeships mix work experience with formal learning. You’ll work with a skilled mechanic and learn by doing.
You can find apprenticeships through:
- Group Training Organizations (GTOs)
- Registered Training Organizations (RTOs)
- Private employers in the heavy vehicle industry
Industry Certifications
Getting certified shows you’re serious about your work. The Certificate III in Heavy Vehicle Mechanical Technology is a respected industry certification.
To get certified, you need to finish a training program and pass a test. This proves you’re skilled and knowledgeable.
By following these education paths, you can become a skilled heavy duty truck mechanic or heavy duty diesel mechanic.
Understanding the Certificate III in Heavy Commercial Vehicle Mechanical Technology (AUR31120)
This nationally recognised qualification prepares individuals to become skilled heavy diesel mechanics. It includes hands-on training in diagnosing, repairing, and maintaining heavy vehicles like trucks and machinery.
The course is ideal for both apprentices and experienced workers. If you’re already working in the industry, you may be eligible to complete it through Recognition of Prior Learning (RPL).
Graduates develop trade-level skills that are in high demand across key sectors such as mining, construction, and transportation.
This qualification also meets the licensing requirements for motor vehicle tradespeople and offers strong job opportunities in a recognised skills shortage area across Australia.
Apprenticeship Opportunities Across Australia
Australia has many apprenticeships for those wanting to be heavy diesel mechanics. These paths lead to a fulfilling career. You can find them in different areas, giving you hands-on experience and a recognised qualification.
Finding an Apprenticeship
To start, look at government sites like myfuture and Australian Apprenticeships. The Australian Trucking Association also lists apprenticeships. Job boards and company websites often have these opportunities, too.
Government Support and Incentives
The Australian Government helps with apprenticeships. They offer money through the Australian Apprenticeships Incentives Program. Some places also help with travel and living costs for apprentices in rural areas.
Duration and Structure
A heavy diesel mechanic apprenticeship usually takes three to four years. It mixes work experience with formal classes at a Registered Training Organization (RTO). This way, you learn both theory and practical skills.
You’ll work with skilled tradespeople, getting better at your job. You’ll learn to fix heavy diesel engines and understand new truck and machinery tech. By the end, you’ll be ready for a career as a heavy diesel mechanic.
Industry Sectors and Specialisations Cert III Holders
With a Certificate III in Heavy Commercial Vehicle Mechanical Technology, you can work in industries like mining, construction, transport, and agriculture.
You’ll learn how to fix and maintain heavy vehicles like trucks and machinery—and you can choose to specialise in areas like diesel engines, hydraulics, transmissions, or electrical systems.
As you gain more experience, you could move into supervisor roles, manage a fleet, or even start your own business.
This qualification is recognised across Australia, so you can work anywhere and grow your career in a trade that’s always in demand.
Salary Expectations and Career Growth
As a heavy diesel mechanic, you can look forward to a good salary and chances for career advancement. The need for skilled heavy duty truck mechanics in Australia is growing. This is thanks to the mining and transportation sectors.
The salary for heavy diesel mechanics changes based on location, experience, and industry. Let’s look at what you can expect at different career stages.
Entry-Level Positions
At the start, entry-level heavy diesel mechanic jobs pay around $50,000 to $60,000 a year. These roles are key for getting practical experience and starting your career.
As a new heavy duty truck mechanic, you’ll work under more experienced mechanics. You’ll learn the job’s details and improve your skills.
Experienced Mechanic Earnings
With more experience, heavy diesel mechanics can earn more. They can make between $80,000 and $100,000 a year. This depends on their skills and the industry they work in.
Experienced mechanics are in high demand. Their salaries show how valuable they are to employers. Specializing in areas like mining or transportation can also boost earnings.
Additional Income Opportunities
There are ways for heavy diesel mechanics to earn more than their base salary. Overtime is common, which can be during busy times or in industries with high demand.
Some mechanics start their own businesses or work as contractors. This can greatly increase their earnings. Entrepreneurial spirit and a strong network can help find new income sources.
Also, bonuses and incentives might be given by employers. These are to keep skilled mechanics and reward their hard work.
Tools and Equipment Essentials
As a heavy diesel mechanic in Australia, you’ll need to know about many specialized tools and equipment. The right tools are key for fixing complex diesel engines and keeping heavy machinery running.
Important tools for heavy diesel mechanics include diesel engine diagnostic tools, hydraulic presses, and welding machines. You might also use specialized software to find and fix problems.
A Cert III heavy diesel mechanic needs to be skilled with these tools. You can get this experience through apprenticeships or training programs.
Some of the essential tools and equipment include:
- Diesel engine diagnostic equipment
- Hydraulic presses
- Welding machines
- Air compressors
- Specialized toolsets for heavy diesel engines
Having the right tools and equipment is vital for success as a heavy diesel mechanic. By learning to use them well, you’ll be on your way to a fulfilling career in this field.
Why Join Onshift Workforce by Mechcorp?
If you’re a skilled tradie, OnShift Workforce by Mechcorp offers a seamless way to advance your career with unmatched flexibility and support. Here’s why joining this platform is a game-changer:
Benefits of OnShift Workforce
- Access to Premium Opportunities: Get notified of high-quality, paid gigs from well-regarded clients in construction, mining, and other heavy industries. No more scouring for work, let the opportunities come to you!
- Financial Assurance: Forget about the hassle of chasing unpaid invoices. OnShift Workforce guarantees prompt payments, allowing you to focus on what you do best without financial stress.
- Work-Life Balance: Choose when and where you work. Whether you want to fill your calendar or prefer sporadic jobs, the choice is yours.
- No Cost, No Commitment: Joining is free, with no binding contracts. You’re free to decide how much you want to engage with the platform.
How It Works
- Sign Up: Visit join.mechcorp.com.au/onshiftworkforce to create your free account.
- Get Matched: Receive job notifications that match your skills and preferences. You choose the gigs that align with your career goals.
- Work and Earn: Complete your selected gigs, and enjoy prompt payments. It’s as straightforward as that!
Start Your Journey
Don’t miss the opportunity to elevate your career with OnShift Workforce by Mechcorp. By joining a network of trusted professionals, you open doors to a steady stream of work, faster payments, and relieve yourself of administrative burdens.
Ready to take control of your career? Sign up today and step into a future with endless possibilities.
At MechCorp, we support our people in growing, learning, developing their skills, and reaching their full potential. With a strong reputation in the industry, we offer a diverse and inclusive environment with extraordinary career opportunities. Our strategy focuses on creating a safe work environment where employees feel connected to our values and objectives and where the capability of our people drives our success.
Come and be a part of this success!
Your Next Gig is Waiting!

Get More Paid Jobs, Fast Payments & Zero Admin Hassles. Join Our Onshift Workforce
It’s 100% Free
Follow Us
Mechcorp specialises in supplying skilled tradespeople and professional staff to the logistics, construction, and mining industries.

Copyright © 2025 mechcorp.com.au