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Heavy Duty Diesel Technician - Mobile Service Truck

Stewart's Heavy Duty LLC
Auburn, AL Full Time
POSTED ON 10/10/2026
AVAILABLE BEFORE 2/7/2027

JOB OVERVIEW:

Stewarts Heavy Duty LLC is seeking an experienced Heavy Duty Diesel Technician to join our team in the Auburn, Alabama area. This position will primarily operate out of a fully equipped service truck while also having access to a large shop area.

The technician will be responsible for diagnosing, maintaining, servicing, and repairing heavy-duty trucks and equipment, with a primary focus on refuse and waste industry equipment.

We are looking for an experienced technician who is dependable, safety-conscious, mechanically skilled, and capable of working independently. Because this is a mobile service position, the technician must be comfortable working with limited supervision and making sound decisions regarding diagnostics and repairs in the field.

Primary Duties & Responsibilities

  • Inspect, diagnose, troubleshoot, service, and repair heavy-duty diesel trucks and equipment.
  • Diagnose and repair mechanical, electrical, hydraulic, and pneumatic systems.
  • Perform preventative maintenance and routine services on diesel engines, transmissions, and related components.
  • Diagnose and repair air brake systems.
  • Diagnose and repair hydraulic systems commonly found on refuse and waste equipment.
  • Troubleshoot electrical issues using wiring diagrams, schematics, diagnostic equipment, and testing procedures.
  • Perform diesel engine diagnostics and repairs.
  • Diagnose and repair aftertreatment systems, including DPF, DEF, EGR, and related emissions components.
  • Perform welding and light fabrication when necessary.
  • Use power, pneumatic, and hand tools to safely remove, repair, and reinstall components.
  • Perform roadside, yard, and field service repairs from a service truck.
  • Test-drive and/or function-test equipment following repairs to verify proper operation.
  • Complete accurate and professional repair documentation, including the complaint, cause, correction, parts used, and work performed.
  • Maintain the assigned service truck, tools, equipment, and work area in a clean and organized condition.
  • Communicate repair findings, additional repairs needed, parts requirements, and equipment status to management.
  • Follow company safety procedures and proper repair practices at all times.

Required Qualifications

  • Previous professional experience as a Heavy Duty Diesel Technician/Mechanic is required.
  • Strong knowledge of diesel engines and heavy-duty truck systems.
  • Experience diagnosing and repairing air brake, hydraulic, electrical, and mechanical systems.
  • Ability to read and interpret electrical diagrams, hydraulic schematics, service information, and manufacturer repair procedures.
  • Ability to perform welding and basic fabrication.
  • Experience using diagnostic software and electronic diagnostic equipment.
  • Ability to properly operate hand tools, power tools, shop equipment, and diagnostic equipment.
  • Must possess a valid driver's license and clean driving record/MVR due to operation of a company service truck.
  • Must be able to pass a drug screening.
  • Must be dependable and capable of reporting to work as scheduled.
  • Must be able to work independently with minimal supervision.
  • Must demonstrate good judgment when determining appropriate diagnostic and repair procedures.
  • Must be able to safely perform the physical duties associated with heavy-duty truck repair.

Diagnostic Software Experience

Experience with the following diagnostic platforms is strongly preferred:

  • Volvo PTT / Tech Tool
  • Allison DOC
  • Cummins INSITE
  • DiagnosticLink 8
  • DAVIE4 / PACCAR

Experience with additional OEM or aftermarket diagnostic platforms is a plus.

Preferred Experience

  • Previous experience working on refuse trucks, garbage trucks, roll-off trucks, front loaders, rear loaders, or automated side loaders.
  • Experience diagnosing and repairing refuse-body hydraulic systems.
  • Experience with waste compactors and compactor systems is a plus.
  • Experience performing mobile or roadside service.
  • Experience working independently from a service truck.
  • Strong electrical diagnostic and troubleshooting skills.
  • Welding and fabrication experience.

The right candidate is a self-motivated and experienced technician who does not require constant supervision. This position requires someone who can evaluate a problem, properly diagnose the cause, determine the appropriate repair, and communicate with management when additional authorization, parts, or assistance is needed.

We expect our technicians to take pride in their work, perform repairs safely and correctly, maintain professional documentation, and treat company and customer equipment with care.

Stewarts Heavy Duty LLC is looking for someone who wants to be part of a growing heavy-duty diesel operation and can be trusted to represent our company professionally while working in the field.

Pay: Up to $35.00 per hour

Benefits:

  • Paid time off

Work Location: On the road

Salary : $35

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