Diesel Technician II in Bolingbrook, Illinois at Unlimited Carrier Inc

Department: Truck Service Point
Reports to: Shop Foreman
Effective Date: 09/08/26

The Diesel Truck Technician II is a mid-level technician responsible for performing intermediate repairs, diagnostics, and preventative maintenance on diesel-powered trucks and related fleet equipment. This role requires solid technical competency, the ability to work independently on most repairs, and the capability to assist lower-level technicians with training and troubleshooting.

Responsibilities include but are not limited to:

• Perform intermediate-level diagnosis and repair of mechanical, electrical, and emission-related issues.
• Troubleshoot and repair:
  • Diesel engines
  • Aftertreatment systems (DPF, DOC, SCR)
  • Electrical and charging systems
  • Cooling systems
  • Brake and air systems
  • Suspension and steering components
• Use diagnostic tools and OEM software to identify root-cause issues.
• Perform component replacements, adjustments, and calibrations as required.

• Perform and sign off on PM A/B/C services.
• Conduct DOT-level inspections and ensure equipment meets regulatory compliance.
• Identify and document potential failures or safety hazards during PMs.

• Accurately document all work orders, labor hours, parts used, and diagnostic findings.
• Maintain clear communication with supervisors regarding equipment status.
• Provide repair recommendations and improvement suggestions for recurring issues.

• Follow all company safety programs and PPE requirements.
• Maintain a clean, organized, and hazard-free work environment.
• Properly use shop equipment, lifts, and specialty tools.

• Assist Diesel Technician I personnel with troubleshooting and hands-on training.
• Provide guidance on proper repair procedures and shop best practices.
• Support overall shop efficiency and workflow.

• High school diploma or GED.
• 2–4 years of experience as a diesel or automotive technician.
• Proficiency with diagnostic tools and repair procedures.
• Ability to read schematics, wiring diagrams, and technical manuals.
• Valid driver’s license.
• Ability to lift 50+ lbs and perform physically demanding tasks.

• Completion of a diesel or automotive technical program.
• OEM training (e.g., Cummins, Detroit, PACCAR, Navistar) is highly desirable.
• ASE Medium/Heavy Truck certifications (T-Series).
• Demonstrated ability to train or mentor junior technicians.
• CDL Class A or B.

• Shop setting with exposure to noise, fumes, moving vehicles, and heavy machinery.
• Requires physical activity including standing, kneeling, climbing, and lifting.
• May require occasional outdoor work depending on facility setup.

Pay Range: $28.00–$36.00 per hour, depending on experience, certifications, and shift assignment.