Senior Diesel Technician: Diagnostics & Mentorship

Unlimited Carrier Inc.; Bolingbrook (IL); On-site; USD 52,000 - 61,000; Full time

Job summary

Unlimited Carrier Inc. seeks a Diesel Technician III in Bolingbrook, IL. The role performs complex diagnostics and advanced repairs on diesel trucks, acting as a technical expert within the shop and mentoring junior technicians.

You will lead diagnostic efforts, ensure high repair quality, and support shop leadership. The position requires 5+ years in diesel repair, strong knowledge of electrical and aftertreatment systems, and proficiency with OEM software.

Qualifications

• Minimum of 5 years of experience in diesel truck repair.
• Advanced diagnostic skills using OEM software.
• Strong understanding of electrical systems and aftertreatment.
• Valid driver's license and ability to lift 50+ pounds.

Responsibilities

• Perform advanced diagnostics on complex mechanical, electrical, aftertreatment, and driveline systems.
• Repair engines, transmissions, differentials, and major components as needed.
• Conduct preventative maintenance and ensure regulatory compliance (DOT).
• Mentor and train junior technicians and support shop leadership.
• Document repairs and parts usage accurately in maintenance systems.

Skills

5+ years diesel/heavy equipment repair

Leadership & mentoring

Ability to read wiring diagrams

Education

ASE Medium/Heavy Truck (T-Series) certification

ASE Master Certification

Tools

Cummins INSITE

Detroit DiagnosticLink

Navistar Service Software

Job description

Unlimited Carrier Inc. seeks a Diesel Technician III in Bolingbrook, IL. The role performs complex diagnostics and advanced repairs on diesel trucks, acting as a technical expert within the shop and mentoring junior technicians.

You will lead diagnostic efforts, ensure high repair quality, and support shop leadership. The position requires 5+ years in diesel repair, strong knowledge of electrical and aftertreatment systems, and proficiency with OEM software.