Heavy Diesel Plant Mechanic, Lawnton QLD Heavy Diesel Plant Mechanic, Lawnton QLD Join Keller Australia as a Heavy Diesel Plant Mechanic, maintaining specialist heavy plant and equipment and keeping our operations running safely and efficiently.

Heavy Diesel Plant Mechanic – Lawnton QLD About Keller Australia We are Australia's leader in geotechnical solutions and proud to be one of the globally connected companies of Keller, the world's largest geotechnical engineering contractor. We have delivered industry leading foundations and ground improvement solutions to the building, construction, and mining industries in Australia for over 60 years.

About the role We are seeking a Heavy Diesel Plant Mechanic to oversee maintenance operations, ensuring the reliability and efficiency of our specialist plant and equipment.

Key responsibilities

Servicing and maintaining heavy plant and mobile equipment

Skilled in diagnosing and repairing diesel engines

Proficient in working with hydraulic systems, including pumps, valves, and cylinders

Experienced in mechanical repairs to drivetrains, transmissions, and braking systems

Competent in basic electrical fault-finding on plant equipment

Able to perform both planned maintenance and breakdown repairs efficiently

Adheres to safe work practices, isolation procedures, and workshop standards

Knowledgeable in plant maintenance schedules and maintaining accurate documentation

Ensure all maintenance work complies with HSEQ policies & safety standards

Maintain strong relationships with internal teams, suppliers & subcontractors

Provide technical support and ensure work meets Keller's quality standards





Able to carry out day-to-day hands‑on fitter duties alongside leading responsibilities

About you

Trade-qualified Mobile Plant, Heavy Diesel Vehicle Mechanic (Certificate III or equivalent)

Strong experience in similar environments

Hands‑on experience across a wide range of heavy machinery equipment

Diagnostic, hydraulic, mechanical, electrical, and diesel engine repair skills

Proven experience in component and full machine rebuilds, overhauls, shutdowns, and preventative maintenance to OEM standards

Confident working independently onsite, managing servicing schedules, breakdowns, parts procurement, and maintenance priorities

Additional skills in fabrication, fitting, machining, welding (MIG, oxy, plastic), and auto-electrical diagnostics (advantageous)

Strong commitment to safety, reliability, and maintaining fleet uptime

Full Australian working rights

Why work with us

Job stability with a global leader

Flexible working setting

A strong commitment to learning and development

Collaborative and supportive team culture

Contribute to sustainability improvements in construction

Knowledge-sharing from global experts

Fair employment practices with a focus on promoting from within

Exposure to innovative projects and career progression opportunities

Keller Australia is an equal opportunity employer, and we support diversity in our workforce. Applications from people of culturally and linguistically diverse backgrounds; equity target groups including women, people with disabilities, people who identify as LGBTI+; and people of Aboriginal and Torres Strait Islander descent, are encouraged to apply.

📌 Heavy Diesel Plant Mechanic, Lawnton QLD (Brisbane)
🏢 Keller Group
📍 Brisbane