Department: Maintenance / Workshop
Job Title: Automotive Mechanic – Diesel Vehicles
Reports To: Workshop Supervisor / Maintenance Manager
Work Location: Al Kharj, Riyadh Region, Saudi Arabia
Industry: Automotive, Military Vehicles, Commercial Vehicles and Vehicle Manufacturing
1. Job Purpose
To perform inspection, maintenance, troubleshooting, repair, and overhaul of diesel-powered vehicles and their mechanical systems, including commercial vehicles, heavy-duty vehicles, military vehicles, and specialized or armored vehicle platforms. The role ensures vehicle reliability, operational readiness, safety, and compliance with established maintenance standards and manufacturer specifications.
2. Key Responsibilities
Vehicle Inspection and Diagnostics
Inspect diesel-powered vehicles to identify mechanical faults, abnormal noises, leaks, wear, and performance issues.
Diagnose problems involving diesel engines, transmissions, drivetrains, cooling systems, and other mechanical components.
Use appropriate diagnostic tools, testing equipment, and technical manuals to identify faults.
Perform routine vehicle inspections and report any defects requiring corrective action.
Identify the root causes of mechanical failures and recommend suitable repair solutions.
Diesel Engine Maintenance and Repair
Perform preventive and corrective maintenance on diesel engines.
Inspect, service, and repair engine components, including cylinder heads, pistons, injectors, fuel pumps, turbochargers, and lubrication systems.
Maintain and repair diesel fuel injection systems and engine cooling systems.
Replace worn or damaged engine components and perform engine disassembly and reassembly when required.
Conduct engine performance checks and verify proper operation following repairs.
Mechanical Systems Maintenance
Inspect, maintain, and repair transmissions, clutches, differentials, drive shafts, axles, and drivetrain components.
Service suspension, steering, braking, and wheel assemblies.
Inspect and maintain hydraulic and pneumatic systems where applicable.
Perform lubrication, fluid replacement, filter changes, and other scheduled maintenance tasks.
Support maintenance activities involving heavy-duty and specialized vehicle systems.
Military and Specialized Vehicle Support
Perform mechanical maintenance on military, armored, and specialized vehicles according to approved technical instructions.
Inspect mechanical components affected by heavy-duty operating conditions and additional vehicle weight.
Support the maintenance and repair of vehicle powertrain, chassis, and auxiliary mechanical systems.
Assist with vehicle modification, component replacement, and mechanical integration activities under approved procedures.
Follow project-specific technical requirements and security procedures when working on defense-related vehicles.
Testing and Quality Control
Conduct operational checks and functional tests after completing repairs.
Perform road tests or controlled workshop tests when authorized and safe.
Verify that repaired components meet manufacturer specifications and company quality requirements.
Document completed repairs, replaced parts, test results, and outstanding defects.
Report recurring mechanical failures and recommend preventive measures.
Workshop Safety and Documentation
Use tools, lifting equipment, and workshop machinery safely and correctly.
Follow lockout procedures, vehicle securing requirements, and safe handling practices for fuels, oils, and other workshop materials.
Maintain workshop cleanliness and ensure tools and equipment are properly stored.
Complete maintenance checklists, work orders, inspection reports, and service records.
Coordinate with workshop supervisors, technicians, electricians, and quality inspectors.
3. Qualifications and Experience
Diploma, technical certificate, or vocational qualification in Automotive Mechanics, Diesel Engine Technology, Heavy Vehicle Maintenance, or a related field.
Typically 3–5 years of practical experience in diesel vehicle maintenance and repair.
Experience with diesel engines, heavy-duty vehicles, commercial vehicles, or military vehicles is preferred.
Practical knowledge of engine overhaul, fuel systems, transmissions, drivetrains, and vehicle maintenance procedures.
Experience with armored or specialized vehicles is an advantage.
Relevant manufacturer or diesel engine maintenance certifications are desirable.
4. Technical Skills
Strong practical knowledge of diesel engines and automotive mechanical systems.
Ability to diagnose and repair diesel engine and drivetrain faults.
Familiarity with diesel fuel injection systems, turbochargers, cooling systems, and lubrication systems.
Ability to use automotive diagnostic equipment, mechanical tools, and workshop testing instruments.
Ability to read and interpret technical manuals, maintenance instructions, and mechanical drawings.
Knowledge of preventive maintenance schedules and repair procedures.
Familiarity with hydraulic systems and heavy-duty vehicle components.
Basic computer skills for maintenance records and work order systems.
Understanding of workshop safety requirements and quality control procedures.
5. Core Competencies
Mechanical troubleshooting and problem-solving.
Practical technical ability and attention to detail.
Commitment to safety and quality.
Ability to work independently and as part of a maintenance team.
Effective communication with supervisors and colleagues.
Good time management and task prioritization.
Ability to work under pressure and meet maintenance deadlines.
6. Key Performance Indicators (KPIs)
Completion of preventive maintenance tasks according to schedule.
Accuracy and effectiveness of mechanical fault diagnosis.
First-time repair success rate.
Reduction in recurring mechanical failures and vehicle downtime.
Compliance with workshop safety and quality procedures.
Accuracy and timely completion of maintenance records.
Efficient use of spare parts, tools, and workshop resources.
7. Working Conditions
Based at the company's workshop and manufacturing facility in Al Kharj, Riyadh Region, Saudi Arabia.
Work may involve diesel engines, heavy components, lubricants, fuels, hydraulic systems, and workshop equipment.
May require working on commercial, military, armored, and specialized vehicles.
Physical activity, lifting within approved limits, and working in workshop environments are required.
Compliance with company safety regulations, PPE requirements, and technical procedures is mandatory.
8. Authority and Accountability
The Automotive Diesel Mechanic is responsible for the quality, safety, and accuracy of assigned maintenance and repair work. The employee must repo
