Position Overview The Heavy Diesel Mechanic is responsible for the inspection, servicing, maintenance, diagnosis and repair of the company’s heavy mobile plant, trucks, trailers, light vehicles and associated equipment. The position is based in our Forrestdale Workshop.

The role will work across a diverse fleet including excavators, wheel loaders, skid steer loaders, compactors, poly welding machinery, directional drills, trucks, trailers and light vehicles. The position requires a strong focus on preventative maintenance, breakdown response, equipment reliability and safe operation.

Key Responsibilities

Plant & Fleet Maintenance

- Perform scheduled servicing and preventative maintenance on heavy mobile plant, poly welding machinery, directional drills, trucks, trailers and light vehicles.
- Diagnose, repair and maintain diesel and petrol engines and associated components.
- Carry out mechanical, hydraulic, electrical and pneumatic fault finding and repairs.
- Maintain excavators, wheel loaders, skid steer loaders, compactors and other mobile plant.
- Maintain trucks, water trucks, trailers and associated equipment.
- Carry out servicing and repairs on light vehicles as required.
- Inspect and maintain attachments, buckets, hitches and auxiliary hydraulic systems.
- Inspect tyres, rims, tracks, undercarriage, brakes, steering and suspension systems.
- Carry out oil, filter, coolant, hydraulic fluid and other fluid changes.
- Perform lubrication and greasing requirements in accordance with service schedules.

Breakdown & Field Repairs

- Respond to plant and vehicle breakdowns both in the workshop and on site.
- Diagnose faults efficiently to minimize equipment downtime.
- Carry out emergency repairs and make equipment safe where immediate repair is not possible.
- Provide mobile field servicing and breakdown support when required.
- Liaise with operators and supervisors to identify equipment faults and operating issues.

Diagnostics & Repairs

- Use diagnostic equipment and manufacturer service information to identify faults.
- Diagnose electrical and electronic faults using appropriate testing equipment.
- Diagnose hydraulic system faults including pumps, motors, valves, cylinders and hydraulic controls.
- Carry out repairs to engines, transmissions, driveline, braking, steering and suspension systems.
- Inspect and repair cooling systems and associated components.
- Identify recurring faults and recommend corrective action.

Inspections & Compliance

- Conduct pre-start and condition inspections of plant and vehicles.
- Identify safety-critical defects and immediately report equipment that is unsafe to operate.




- Ensure maintenance is carried out in accordance with manufacturer specifications and company procedures.
- Maintain inspection and service records.
- Ensure vehicle and plant maintenance documentation is completed accurately.
- Assist with compliance inspections, audits and equipment inspections where required.

Preventative Maintenance

- Maintain and follow preventative maintenance schedules.
- Identify potential failures before they result in equipment breakdowns.
- Monitor equipment condition and provide recommendations for upcoming repairs.
- Identify worn or damaged components requiring replacement.
- Assist management with forecasting major repairs, component replacements and planned downtime.

Workshop & Equipment

- Maintain a clean, safe and organized workshop.
- Maintain tools, diagnostic equipment and workshop machinery in good working condition.
- Ensure service vehicles and mobile workshop equipment are maintained and adequately equipped.
- Maintain appropriate levels of critical spare parts, filters, oils, lubricants and consumables.
- Correctly dispose of oils, filters, batteries and other waste in accordance with environmental requirements.

Safety Responsibilities

- Comply with all company WHS/OHS policies and procedures.
- Follow isolation, lock-out/tag-out and safe maintenance procedures.
- Use appropriate PPE at all times.
- Complete risk assessments, SWMS/JSA requirements and permits where applicable.
- Report hazards, incidents, near misses and defective equipment.
- Never return equipment to service if it is considered unsafe.
- Maintain a high standard of housekeeping in the workshop and work areas.
- Ensure repairs are completed safely and to an appropriate standard before equipment is returned to operation.

Required Qualifications & Experience

- Trade qualification as a Heavy Diesel Mechanic, Diesel Fitter or Mobile Plant Technician.
- Demonstrated experience working on heavy mobile plant and diesel-powered equipment.
- Experience with excavators, wheel loaders, skid steer loaders and compactors.
- Experience working on trucks and trailers.
- Experience with hydraulic systems and fault finding.
- Experience with electrical and electronic diagnostic systems.
- Ability to read and interpret hydraulic,



electrical and mechanical schematics.
- Current WA driver’s licence.
- Ability to work independently and as part of a team.
- Strong commitment to safety and equipment reliability.

Desirable Experience Experience with equipment such as:

- Volvo excavators and loaders
- Komatsu loaders and excavators
- Doosan/DEVELON loaders and excavators
- Hino trucks
- Isuzu trucks
- Volvo/UD Trucks
- Mitsubishi Trucks
- Rollers and compactors
- Skid steer loaders
- Water trucks
- Trailers and heavy transport equipment
- Light vehicles and 4WDs

Key Performance Indicators (KPIs) The Heavy Diesel Mechanic will be expected to:

- Maintain high plant and vehicle availability.
- Minimize unnecessary equipment downtime.
- Complete scheduled servicing within required timeframes.
- Complete repairs safely and to a high standard.
- Accurately record servicing, repairs and parts used.
- Identify potential mechanical failures before breakdown occurs.
- Maintain compliance with manufacturer servicing requirements.
- Maintain a high standard of workshop cleanliness and organization.
- Respond to breakdowns in a timely manner.
- Communicate equipment issues and repair requirements clearly to management.
- Maintain a strong safety record and comply with all company procedures.

Personal Attributes The successful applicant will demonstrate:

- Strong mechanical aptitude and diagnostic ability.
- A practical, hands-on approach.
- High attention to detail.
- Reliability and accountability.
- Ability to prioritize urgent repairs and competing maintenance requirements.
- Good communication skills.
- Ability to work under pressure when dealing with breakdowns.
- Pride in workmanship.
- Commitment to preventative maintenance rather than reactive repairs.
- Strong safety awareness.

Reporting The Heavy Diesel Mechanic will report to the Plant/Fleet Manager or nominated supervisor and will work closely with equipment operators, supervisors, project managers and management. Working Environment The position may involve working:

- In a workshop workplace.
- At construction and earthmoving sites.
- At remote or regional locations.
- Around operating heavy machinery.
- In outdoor conditions and varying weather.
- Outside normal working hours when breakdown or emergency support is required.

Overall Objective The primary objective of the Heavy Diesel Mechanic is to ensure the company’s plant, vehicles and equipment are safe, reliable, compliant and available for operation, while minimizing unplanned downtime and maintaining a high standard of preventative maintenance, If you do not fit the above roll do not apply.

📌 Heavy Diesel Mechanic - Plant & Fleet (Forrestdale)
🏢 Pipeline Technics
📍 Forrestdale