Diesel Mechanic

About The Role:

We’re looking for experienced Heavy-Duty Diesel Fitters to join our Whyalla maintenance team. You’ll carry out diagnostics, repairs, and preventative maintenance on mobile plant and heavy equipment—ensuring reliable operations that support critical mining and industrial processes.

Hands-on and safety-focused, this role involves working closely with the Maintenance Manager and team to boost equipment availability and drive operational efficiency.

Employee Benefits: 

• Live, Work and Play in one location
• Onsite Parking
• Career development

Key Duties:

• Maintain and repair mobile plant and heavy vehicles
• Diagnose faults in diesel, hydraulic, and mechanical systems
• Complete accurate work orders and records
• Support preventative maintenance programs
• Source and replace parts
• Uphold workshop cleanliness and safety
• Follow set maintenance schedules
• Respond to alarms and incidents safely

What You’ll Bring:

• Cert III in Heavy Vehicle Diesel Fitting (or equivalent)
• Strong mechanical skills and initiative
• Safety-first mindset and good communication
• Self-motivated with a team-oriented attitude

Desirable:

• Experience with side tippers, FELs, and mining/industrial mobile fleet
• Knowledge of maintenance systems and schedules
• Basic computer and numeracy skills

About Us:

OneSteel Manufacturing is proud to operate one of Australia’s most critical mining and steel manufacturing businesses. As the nation’s only producer of special grade billet and steel long products, we play a vital role in powering Australia’s infrastructure — from rail networks to major construction projects.

Our Whyalla-based operations are backed by State and Federal Government investment, reinforcing our position as a cornerstone of Australia’s sovereign manufacturing capability. These assets are not only essential to industrial resilience but also contribute to the long-term security and self-sufficiency of the nation’s supply chain.

At OneSteel, we don’t just manufacture steel — we help build the future of Australia.

It is our ambition to cultivate an inclusive workplace that is as diverse as the communities we serve. We encourage candidates from all cultural backgrounds, genders, orientations, age groups, and abilities to apply. Your diversity is our strength in creating sustainable and innovative steel solutions for Australia's tomorrow.

We are a 2025 Circle Back Initiative Employer – we commit to respond to every applicant.