The Diesel Truck Technician III is a highly skilled, senior-level technician responsible for performing complex diagnostics and advanced repairs on diesel-powered trucks and related equipment. This role serves as a technical expert within the shop, providing leadership, mentoring junior technicians, and ensuring high-quality repair standards.
Key Duties and Responsibilities:
Advanced Diagnostics & Repair
- Perform expert-level diagnosis on complex mechanical, electrical, aftertreatment, and driveline systems.
- Troubleshoot and repair:
- Diesel engines
- Aftertreatment & emissions systems (DPF, DOC, SCR)
- Multiplexing & CAN bus systems
- High-level electrical faults and communication issues
- Transmission and drivline components
- Conduct engine performance testing, calibrations, and software updates using OEM tools.
Major Component Repair
- Perform engine component replacement (turbochargers, injectors, EGR systems, pumps).
- Replace major assemblies such as transmissions, differentials, and axles.
- Execute advanced brake, suspension, and steering repairs.
Preventative Maintenance & Compliance
- Conduct and verfy all levels of PM (A/B/C), including advanced inspection points.
- Perform DOT inspections and ensure full regulatory compliance.
- Identify root causes of recurring fleet issues and recommend corrective measures.
Leadership, Training & Technical Suport
- Mentor and train Technicians I and II on best priactices, troubleshooting, and repair methods.
- Serve as a technical resource for complex job assignments.
- Support shop leadership in quality control.
Documentation & Reporting
- Document repairs, diagnostics, and parts usage thoroughly in maintenance systems.
- Contribute to procedural improvements and standard operating practices.
Safety & Shop Standards
- Lead by example in following all safety protocols and PPE requirements.
- Identify hazards and take corrective action to maintain a safe work environment.
- Ensure proper use and care of shop tools, equipment, and diagnostic devices.
Required Skills and Qualifications
- Minimum 5+ years of experiance in diesel truck or heavy equipment repair.
- Advanced diagnostic skills with OEM software (e.g., Cummins INSITE, Detroit DiagnosticLink, Navistar).
- Strong understanding of electrical systems, aftertreatment systems, and data networks.
- Ability to read complex wiring diagrams, schematics, and service manuals.
- Valid driver's license.
- Ability to lift 50+ lbs. and perform physically demanding work.
- Clean driving record and ability to operate semi-trucks (CDL Class A is preferred, but not required).
- A strong commitment to all health and safety guidelines.
Preferred Qualifications
- Formal diesel technology education or equivalent experience.
- Multiple ASE Medium/Heavy Truck(T-Series) certifications, or ASE Master certified.
- OEM-specific training or certifications (Cummins, Detroit, PACCAR, Navistar, Allison).
- Experience training or mentoring other technicians.
- Strong communcation and leadership skills.
Work Environment
- Shop environment with exposure to noise, fumes, and heavy machinery.
- Requires standing, bending, lifting, and use of heavy tools.
- May require occasional outdoor work.
Job Type: Full-time
Pay: $40.00 - $45.00 per hour
Benefits:
- 401(k) matching
- Dental insurance
- Health insurance
- Paid time off
- Vision insurance
Application Question(s):
- How many years of experience do you have working on diesel trucks?
- Which technician level (1-5) best matches your skills and experience?
- Which diagnostic tasks are you confident performing, including computer-based and advanced diagnostics?
- How comfortable are you at performing hands-on mechanical work, including lifing up to 50-100 lbs and working on heavy-duty trucks?
Work Location: In person
