Heavy Duty Diesel Technician / Service Truck Operator

Adcock Brothers Inc.; Northern (KY); Hybrid; USD 55,000 - 85,000; Full time

Job summary

Adcock Brothers Inc. is seeking a Heavy Duty Diesel Technician / Service Truck Operator to service commercial trucks on-site and on the road, using a company mobile service truck.

You will diagnose, repair, and maintain heavy-duty diesel equipment with minimal supervision, leveraging OEM software and a strong commitment to safety and DOT standards.

Qualifications

• 3+ years of experience as Heavy Duty Diesel Mechanic or Mobile Service Technician.
• CDL Class A or B with Hazmat/Tanker preferred.
• Proficient with OEM diagnostic software.
• Ability to lift up to 75 lbs and work in varied weather.
• Independent work ethic with safety focus.

Responsibilities

• Respond to dispatch calls with a mobile service truck for on-site repairs.
• Perform preventative maintenance and DOT inspections.
• Diagnose and repair diesel engines, transmissions, brakes, and hydraulics.
• Troubleshoot electrical and HVAC systems on heavy-duty equipment.
• Maintain accurate service records and parts used.

Skills

Field diagnostics

Preventative maintenance

Diesel engine troubleshooting

Electrical systems

Safety compliance

Documentation

Education

ASE Certifications (Medium-Heavy Truck)

Tools

Cummins INSITE

Detroit Diesel Diagnostic Link

CAT ET

Job description

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.