Johannesburg: Diesel Technician

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 Perform accurate diagnostics on diesel engines and related systems. Identify faults in engines, gearboxes, clutches, diffs, air systems, braking systems, and driveline components. 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 when required. 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 Control 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. Workshop Operations Maintain accurate time recording and job card updates. Use workshop tools and equipment correctly and responsibly. Maintain cleanliness and organisation of work area. Assist other technicians and apprentices when required. 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.