Heavy-Duty Diesel Fleet Maintenance Technician

The Heavy-Duty Diesel Fleet Maintenance Technician is responsible for executing the preventative maintenance program and performing minor mechanical repairs for Otwell Services/Otwell Trucking's commercial dump truck and trailer fleet. This hands-on role focuses on high-frequency maintenance tasks—specifically scheduled PM servicing, complete tire management, and fundamental mechanical troubleshooting. The primary goal of this position is to maximize fleet readiness, ensure safe vehicle operations, and keep the fleet fully compliant with FMCSA and Department of Transportation (DOT) safety regulations. · Technician must possess the necessary tools and toolbox to perform required repairs. · Technician must perform daily tasks with limited to no supervision, demonstrating the necessary knowledge and skills to complete repairs safely and effectively. · Technician must be familiar with the following equipment/manufacturers: Western Star, Peterbilt, Freightliner, Detroit Diesel, Cummins, Kenworth, Travis, and Mate. ESSENTIAL JOB FUNCTION Preventative Maintenance (PM) Services · Perform routine scheduled maintenance services (A & B PM services) on heavy-duty dump trucks and various trailers. · Conduct complete fluid and filter management, including oil changes, fuel system servicing, fluid flushes, and full chassis greasing. · Complete routine safety-critical inspections on heavy-duty air brake systems, suspension setups, and structural dump body components. · Monitor, adjust, and top off critical fluid levels across engines, transmissions, and differentials. Tire Management & Service · Perform complete commercial tire services, including safely dismounting, mounting, balancing, and rotating heavy truck and trailer tires. · Measure, track, and record tire air pressure and tread depth to maximize fleet tire life and catch wear patterns early. · Safely identify, repair, or replace punctured, damaged, or legally worn wheel and tire assemblies. Troubleshooting & Minor Repairs · Diagnose and execute minor electrical repairs on 12V/24V systems, including replacing lights, fuses, switches, and damaged wiring harnesses. · Identify basic hydraulic system leaks or faults, replacing worn hoses, fittings, and cylinder seals on dump hoist systems. · Perform minor mechanical adjustments and installations on exterior vehicle equipment, including tarps, mud flaps, tailgates, and safety guards. · Utilize basic scan tools and physical inspections to isolate minor mechanical faults before they lead to major roadside breakdowns. Shop Safety & Compliance · Document all parts used, fluid quantities consumed, and labor time spent per unit within the fleet management tracking system. · Maintain a clean, organized, and hazard-free personal bay and shared shop workspace. · Adhere strictly to OSHA standards, EPA/DEQ rules for hazardous waste disposal (used oil, filters, coolant), and company safety protocols. Qualifications and Experience · Functional technical knowledge of vocational heavy-duty components, commercial air brake systems, and fundamental automotive electrical circuits. · Ability to utilize basic diagnostic tools and specialized shop tire equipment safely. · Must possess a foundational set of personal mechanical hand tools and impact sockets suitable for heavy-duty truck maintenance. · Valid driver’s license with a clean driving record is required; a Commercial Driver's License (CDL Class A or B) is a major plus. · Minimum 1–3 years of proven experience as a diesel mechanic or fleet technician focused on commercial trucks and trailers. Education and Certifications · High School Diploma or GED required. · Relevant technical school degree or diesel mechanic certification preferred. · Brake Inspector Certification or specialized tire service certifications are…

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