Description:

The Heavy Duty Diesel Technician / Service Truck Operator is responsible for maintaining, diagnosing, and repairing heavy-duty diesel trucks and equipment. A significant portion of this role involves operating a fully equipped mobile service truck to perform emergency road service, field diagnostics, and on-site repairs, requiring high independence, safety awareness, and technical proficiency.

Core Responsibilities Field Diagnostics & Repair:

Respond to dispatch calls, operating a company-provided mobile service truck to diagnose and repair heavy-duty equipment and commercial trucks on the road or at client job sites.

Preventative Maintenance:

Perform routine maintenance, including oil changes, lubrication, filter replacements, and thorough DOT inspections.

Complex Troubleshooting:

Diagnose and repair diesel engines, transmissions, drivetrains, steering, suspension, air brake systems, and hydraulic systems using OEM software and diagnostic tools.

Electrical & A/C Systems:

Troubleshoot and repair heavy-duty electrical systems, starting/charging systems, and climate control (HVAC) units.

Documentation:

Maintain accurate, real-time records of repairs, time worked, and parts used via electronic work orders.

Service Truck Maintenance:

Keep the assigned mobile service truck clean, fully stocked with necessary parts and fluids, and well-maintained.

Safety Compliance:

Adhere to all OSHA, DOT, and company safety regulations, maintaining a safe workspace in the shop and on the side of the road.

Requirements:

3+ years of proven experience as a Heavy Duty Diesel Mechanic or Mobile Service Technician. Valid Driver's License with a clean driving record (Class A or B CDL with Hazmat/Tanker endorsements is highly preferred). Strong proficiency with computerized diagnostic software (e.g., Cummins INSITE, Detroit Diesel Diagnostic Link, CAT ET). Must possess a complete set of personal hand and pneumatic tools suitable for heavy-duty repair. Ability to work independently in various weather conditions and high-stress roadside environments. ASE Certifications (Medium-Heavy Truck) and Factory/OEM training are a strong plus. Ability to frequently lift, carry, and maneuver items weighing up to 75 lbs. Must be able to stand, kneel, bend, and crawl in confined or awkward spaces for extended periods.