Heavy Duty Diesel Technician / Service Truck Operator

ADCOCK BROTHERS SERVICE CENTER INC; Manheim (PA); On-site; USD 65,000 - 85,000; Full time

Job summary

ADCOCK BROTHERS SERVICE CENTER INC is seeking aHeavy Duty Diesel Technician / Mobile Service Technician to diagnose, repair, and maintain heavy-duty trucks at client sites. The role involves operating a company-provided mobile service truck, performing field diagnostics and on-site repairs with a high degree of independence.

Required are 3+ years of hands-on HD diesel experience, a valid CDL (hazmat/tanker preferred), and proficiency with diagnostic tools like Cummins INSITE, Detroit Diesel

Qualifications

• 3+ years of proven experience as a Heavy Duty Diesel Mechanic or Mobile Service Technician.
• Valid Driver’s License (CDL preferred) with Hazmat/Tanker endorsements when available.
• Strong proficiency with computerized diagnostic software (e.g., Cummins INSITE, Detroit Diesel Diagnostic Link, CAT ET).
• Must possess a complete set of hand and pneumatic tools for heavy-duty repair.
• Ability to work independently in varying weather conditions and roadside environments.
• ASE Certifications and Factory/OEM training are a plus.
• Ability to frequently lift up to 75 lbs and work in confined spaces.

Responsibilities

• Field Diagnostics & Repair: Diagnose and repair heavy-duty equipment and trucks at client sites or on the road.
• Preventative Maintenance: Oil changes, lubrication, filters, and DOT inspections.
• Complex Troubleshooting: Engines, transmissions, drivetrains, brakes, electrical and HVAC systems.
• Documentation: Update electronic work orders with repairs and parts used.
• Service Truck Maintenance: Keep the mobile service truck stocked and ready.

Skills

Independent worker

Safety compliance

Diagnostic software use

Education

ASE Certifications (Medium-Heavy Truck)

Factory/OEM training

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.