At Downer we plan, create and sustain. Downer is the leading provider of integrated services in Australia and New Zealand. Through trusted relationships and world leading insight we work closely with our customers to design, build and sustain assets, infrastructure, and facilities.

Competitive Pay + Overtime | Modern Fleet & Equipment | Growth opportunities & Supportive Team

Heavy Diesel Mechanic - Workshop & Field Role

Location: Maddington, Perth| Employment Type: Full-Time | Workshop & Field-Based

About the Role:

Downer is seeking skilled Heavy Diesel Mechanics, Technicians, or Fitters to join our team in Perth. This hybrid opportunity offers the best of both worlds: hands-on workshop maintenance and varied field service work. One day you'll be in the workshop, the next you'll be on site diagnosing faults and keeping critical projects moving.

We are especially interested in candidates who are flexible to travel when required, and who thrive both in a team environment and when working independently.

If you enjoy problem‑solving, value safety and quality, and want to work with a supportive, collaborative team; this role is for you.

What We Offer

- Competitive hourly rates based on experience, plus overtime opportunities
- Hands-on work with a modern, well-maintained fleet of trucks and plant




- Ongoing training and career development in a supportive setting
- A solid safety-first culture with Zero Harm as a core value
- Inclusive and team-focused culture with regular team activities

Key Responsibilities

- Service, repair, and maintain heavy plant machinery and trucks
- Diagnose and resolve breakdowns in the field
- Travel to various sites when required
- Ensure all work meets Downer's high safety and operational standards
- Collaborate within a skilled team while also being able to work unsupervised

About You

- Trade qualification in Heavy Diesel Mechanics, Plant Mechanics, or Fitting (essential)
- Strong hydraulic knowledge and diagnostic skills
- Experience with mobile plant, trucks, and heavy equipment
- Auto electrical experience (highly regarded)
- Valid licences to support the role (HR and Forklift desirable)
- Strong team player with the capability to operate independently
- A proactive approach and commitment to safety
- Willing to be part of on call roster - 1 week out of 7

Apply Now

Apply below with your resume and cover letter outlining why you would be a great fit for this role!

At Downer, we believe in potential. Even if your experience doesn't perfectly align, we encourage you to apply-you might be exactly who we're looking for.

📌 Heavy Diesel Mechanic (Maddington)
🏢 Downer Group
📍 Maddington