Senior Diagnostic Tech - Troubleshooter for Class 8 Trucks

D.h.t; Reese (MI); On-site; USD 60,000 - 85,000; Full time

Job summary

DHT is seeking an experienced Advanced Diagnostic Technician for the Reese, Michigan main shop on first shift. You will diagnose complex issues across Class 8 trucks, lead diagnostic efforts, and guide other technicians while interpreting wiring diagrams and using OEM software.

Responsibilities include diagnosing engine/electrical/drivability concerns, emissions systems, ABS, and network issues, then recommending repairs and documenting outcomes. ASE certs preferred.

Qualifications

• Strong Class 8 truck diagnostic experience.
• Demonstrated leadership and ability to mentor technicians.
• Advanced electrical/electronic troubleshooting skills.
• Thorough understanding of diesel engines and aftertreatment systems.
• Experience with Detroit DiagnosticLink and Cummins INSITE.
• Familiarity with Bendix and WABCO diagnostic platforms.
• Ability to read wiring diagrams, schematics and technical service information.
• Ability to troubleshoot systematically rather than rely on fault codes.
• Strong problem-solving and root-cause analysis skills.
• Strong communication and teamwork skills.
• ASE certifications preferred.

Responsibilities

• Perform advanced diagnostics on Class 8 trucks and related systems.
• Troubleshoot engine performance, electrical and drivability concerns.
• Diagnose emissions and aftertreatment systems, including DPF, DEF and SCR.
• Diagnose ABS and electronically controlled braking systems.
• Troubleshoot fault codes, warning lights and communication/network issues.
• Perform electrical testing and interpret wiring diagrams and schematics.
• Use OEM diagnostic software and electronic service information.
• Diagnose intermittent and difficult-to-reproduce problems.
• Determine root causes and recommend appropriate repairs.
• Verify completed repairs and confirm equipment is ready to return to service.
• Provide technical guidance and diagnostic support to other technicians.
• Help develop troubleshooting skills and share diagnostic knowledge across the shop.
• Maintain accurate diagnostic and repair documentation.

Skills

Strong Class 8 diagnostics

Leadership & mentoring

Electrical troubleshooting

Diesel engine & aftertreatment

Detroit DiagnosticLink / INSITE

Bendix / WABCO diagnostics

Wiring diagrams & schematics

Systematic troubleshooting

Root-cause analysis

Communication & teamwork

ASE certifications

Job description

DHT is seeking an experienced Advanced Diagnostic Technician for the Reese, Michigan main shop on first shift. You will diagnose complex issues across Class 8 trucks, lead diagnostic efforts, and guide other technicians while interpreting wiring diagrams and using OEM software.

Responsibilities include diagnosing engine/electrical/drivability concerns, emissions systems, ABS, and network issues, then recommending repairs and documenting outcomes. ASE certs preferred.