Heavy Duty Diesel Technician – Truck Mechanic (Diagnostics & Repair)

Overview

A well-established, family-style heavy-duty truck service shop with over 40 years in the Wisconsin and Illinois transportation industry is seeking an experienced Diesel Technician. This is a small, highly skilled team environment where technicians work independently, are trusted with complex repairs, and are supported through ongoing OEM-level training.

We are looking for a seasoned technician with strong diagnostic ability and hands-on experience in full-scope diesel truck repair.

Key Responsibilities

• Diagnose and repair heavy-duty diesel trucks (all-makes)
• Perform repairs on engines, transmissions, differentials, driveline, steering, suspension, and air/hydraulic brake systems
• Complete major engine repairs, including injectors, pistons, liners, heads, camshafts, bearings, and related components
• Use diagnostic tools/software to troubleshoot mechanical and electrical systems
• Inspect vehicles and determine required safety or additional repairs
• Perform road tests to verify repair quality and performance
• Accurately document repair orders and service recommendations
• Maintain compliance with OEM, dealership, and safety standards
• Work efficiently while ensuring high-quality workmanship

Required Qualifications

• 5+ years of hands-on experience as a Diesel Technician / Heavy-Duty Truck Mechanic
• Strong diagnostic and electrical troubleshooting skills using scan tools/computer systems
• Proven experience with engines, transmissions, differentials, driveline, brakes, and suspension systems
• Ability to complete full repair cycles independently (diagnosis through completion)
• Must own a full professional toolset
• Valid driver's license with a clean driving record
• Ability to obtain a CDL (if required for duties)
• High school diploma or equivalent (technical training preferred)

Preferred Qualifications

• ASE certifications and/or OEM training (International, Cummins, etc.)
• EPA 608/609 certification
• Experience in dealership or fleet maintenance environments
• Strong tenure in previous diesel/heavy-duty technician roles
• Experience mentoring or supporting junior technicians

Work Environment

• Small shop (low micromanagement, tight-knit team)
• Lead-level technician responsibilities
• Independent work with full accountability for repair quality
• Ongoing OEM-certified training and skill development
• Stable, long-term employment environment

Schedule & Benefits

• Monday–Friday schedule (no nights, no weekends)
• First-shift daytime hours
• Tool and work boot allowance
• Continuous internal and OEM training programs
• Supportive, family-oriented shop culture