Diesel Technician - Heavy Duty Trucks

Job Description Job Description Job Title: Experienced Diesel Technician – Heavy-Duty Trucks
Location: Sheboygan, WI (Onsite)
Schedule: Full-Time | Monday–Friday | 1st Shift (8:00 AM–5:00 PM or 7:30 AM–4:30 PM) | No weekends or nights
Job Overview
We are seeking an experienced Diesel Technician to join a respected, long-established heavy-duty truck service team serving Wisconsin and Illinois for over 40 years. This is a great opportunity for a skilled technician who wants a stable first-shift schedule, strong team culture, ongoing OEM training, and the ability to take ownership of repair work from diagnosis to completion.
You will work on all-makes commercial trucks and buses, performing advanced diagnostics, repairs, and preventive maintenance. Senior technicians may also mentor junior team members and contribute to maintaining high service standards.
Key Responsibilities
Perform repairs as outlined on work orders with accuracy and efficiency
Diagnose and troubleshoot mechanical, electrical, and performance issues
Repair and overhaul diesel engines, transmissions, differentials, and driveline systems
Service brake systems (air and hydraulic), steering, suspension, and HVAC systems
Install and replace components including injectors, pistons, liners, camshafts, bearings, clutches, and more
Use diagnostic software/tools to identify and resolve issues
Conduct road tests to verify repairs and vehicle performance
Document all work performed according to company and industry standards
Follow all safety procedures and maintain a clean, compliant work environment
Support continuous improvement and participate in ongoing technical training
Required Qualifications
5+ years of hands-on experience with diesel engines and heavy-duty trucks
Strong diagnostic and troubleshooting skills (mechanical and electrical systems)
Experience with engines, transmissions, differentials, brakes, steering, and driveline systems
Ability to use diagnostic computers/software
Must own a complete professional toolset
Valid drivers license with a clean driving record
Ability to obtain a CDL if not already held
High school diploma or equivalent (technical/vocational training preferred)
Preferred Qualifications
ASE certifications and/or OEM training
EPA 608/609 certification
Experience with International trucks or Cummins engines
Prior dealership or fleet maintenance experience
What We Offer
Stable Monday–Friday schedule (no nights or weekends)
Small, team-oriented shop environment (no micromanagement)
Family-like culture with strong technician respect and support
Tool and work boot allowance
Ongoing OEM-certified training and internal development programs
Opportunity to work independently and grow into a lead technician role
Work Environment
Small, highly skilled technical team (lean shop structure)
Focus on quality repairs, efficiency, and continuous improvement
Mentorship opportunities for senior technicians
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