**Job Objective:** Perform advanced diagnostics, repair, and preventive and corrective maintenance on heavy-duty units (trucks, tractor-trailers, concrete pump trucks, and concrete mixers) to ensure optimal performance and availability. **Key Responsibilities:** * Advanced diagnosis of mechanical and electrical faults in diesel engines. * Repair of engine, transmission, air brake, suspension, and hydraulic systems. * Comprehensive preventive maintenance: oil and filter changes, valve adjustments, general inspections. * Interpretation of diagrams, scanner data, and diagnostic tools. * Supervise and guide Level B mechanics and assistants. * Report completed work and request spare parts. * Ensure compliance with safety regulations. Employment Type: Full-time Salary: $18,000.00 – $20,000.00 per month Benefits: * Salary increases * Savings fund * Company parking * Option for indefinite-term contract * Medical expense insurance * Company phone * Free uniforms * Grocery vouchers Work Location: On-site employment