Diesel Technician

Mayfair Gearbox; Johannesburg; On-site; ZAR 250,000 - 350,000; Full time

Job summary

Mayfair Gearbox in Johannesburg is seeking a skilled Diesel Technician to diagnose and repair fleet vehicles and heavy-duty trucks. The role demands strong mechanical expertise and the ability to work efficiently under pressure to minimize downtime for fleet clients.

The ideal candidate will possess a Trade Test qualification as a Diesel Mechanic and have 3–5 years of hands-on experience. You must also hold a valid driver’s license. A commitment to high-quality workmanship and safety compliance is essential.

Qualifications

• 3–5 years experience as a Diesel Technician in a commercial or fleet workshop.
• Experience working on heavy-duty trucks.
• Valid driver’s license (Code 14 / EC is an advantage).

Responsibilities

• Diagnose and repair heavy-duty diesel engines and components.
• Conduct preventative maintenance and scheduled fleet servicing.
• Ensure adherence to health and safety compliance.

Skills

Fault-finding and diagnostic ability

Ability to work under pressure

Attention to detail

Good communication skills

Time management

Education

Matric / Grade 12

Trade Test qualification as a Diesel Mechanic

Job description

Overview

The Diesel Technician will be responsible for diagnosing, repairing, and servicing fleet vehicles and heavy-duty trucks within the Mayfair Gearbox Fleet Division. The role requires strong mechanical expertise, the ability to work efficiently under pressure, and a commitment to delivering high-quality workmanship to minimise downtime for fleet clients.

Key Responsibilities

• Diagnostics & Fault Finding: Diagnostics on diesel engines and related systems; use diagnostic tools and equipment to assess mechanical and electronic faults; provide accurate feedback to the foreman/service advisor for quoting and repair planning.
• Repairs & Maintenance: Conduct repairs on heavy-duty diesel engines and components; perform gearbox removals and refits; replace or repair clutches, differentials, prop shafts, turbochargers, and fuel system components; carry out preventative maintenance and scheduled fleet servicing; ensure all repairs are completed to Mayfair Gearbox standards.
• Fleet Support: Assist with breakdown diagnostics and urgent fleet repairs; ensure minimal downtime for fleet clients through efficient workmanship; maintain service schedules and complete jobs within agreed turnaround times.

Quality & Safety

• Ensure correct repair procedures and torque specifications are followed.
• Conduct final inspections before releasing vehicles.
• Minimise comebacks by maintaining high standards of workmanship.
• Report any additional faults discovered during repairs.
• Health & Safety Compliance: Follow all workshop safety policies and procedures; ensure correct use of PPE at all times; operate lifting equipment and machinery safely; maintain a clean and hazard-free working environment.

Minimum Requirements

• Matric / Grade 12 (preferred).
• Trade Test qualification as a Diesel Mechanic (essential or advantage).
• Minimum 3–5 years experience as a Diesel Technician in a commercial or fleet workshop.
• Experience working on heavy-duty trucks (essential).
• Valid driver’s license (Code 14 / EC advantage).

Technical Knowledge Required

• Diesel engine diagnostics and repairs.
• Manual and automated truck gearboxes (advantage).
• Clutch systems and driveline components.
• Air brake systems and suspension systems.
• Fuel systems (injectors, pumps, common rail systems).
• Preventative maintenance and fleet servicing procedures.

Key Skills & Competencies

• Strong fault-finding and diagnostic ability.
• Ability to work under pressure and meet deadlines.
• Good time management and productivity focus.
• High attention to detail and quality workmanship.
• Ability to work independently and as part of a team.
• Good communication skills.
• Reliable, disciplined, and accountable.