Diesel Mechanic

Interstate Companies, Inc.; Madison (WI); On-site; USD 60,000 - 80,000; Full time

Benefits offered by this job

Competitive pay

Manufacturer training

Health benefits

401(k) plan

Tuition assistance

Paid PTO

Job summary

I-State Truck Center in Madison, Wisconsin is hiring diesel mechanics of all experience levels to join our service team. We welcome recent diesel graduates, technicians moving into heavy‑duty repair, and seasoned diesel technicians seeking their next opportunity.

You’ll work on Class 6–8 trucks with engines from Detroit Diesel, Cummins, CAT and more. Expect hands‑on maintenance, diagnostics, and repairs, plus ongoing manufacturer training and a strong safety culture.

Qualifications

• Entry-level to experienced diesel technicians.
• Diesel or automotive technical training preferred.
• Diesel engines, mechanical and electrical systems knowledge.
• Strong mechanical aptitude and troubleshooting.
• Ability to read service manuals, wiring diagrams, and schematics.
• Valid driver’s license required; ASE/CDL a plus.

Responsibilities

• Perform preventive maintenance, inspections, diagnostics, and repairs.
• Troubleshoot diesel engines, aftertreatment, electrical, brake, suspension, and drivetrain systems.
• Use diagnostic tools such as Cummins INSITE, Detroit Diesel DiagnosticLink, and other OEM software.
• Repair and replace components based on your skill and experience level.
• Accurately document repairs and completed service work.
• Maintain a clean, organized, and safe work environment.
• Participate in ongoing technical and manufacturer training.

Skills

Diesel engines

Mechanical aptitude

Troubleshooting

Reading schematics

Education

Diesel or automotive technical training

Tools

Cummins INSITE

Detroit Diesel DiagnosticLink

Job description

Location: Madison, Wisconsin
Company: I-State Truck Center

I-State Truck Center is hiring Diesel Mechanics of all experience levels at our Madison location. We’re open to recent diesel graduates, automotive technicians looking to move into heavy‑duty repair, and experienced diesel technicians ready for their next opportunity.

Our technicians work on Class 6–8 trucks, including Freightliner, Western Star, and other major heavy‑duty platforms, with engines such as Detroit Diesel, Cummins, CAT, and more.

What You’ll Do

• Perform preventive maintenance, inspections, diagnostics, and repairs.
• Troubleshoot diesel engines, aftertreatment, electrical, brake, suspension, and drivetrain systems.
• Use diagnostic tools such as Cummins INSITE, Detroit Diesel DiagnosticLink, and other OEM software.
• Repair and replace components based on your skill and experience level.
• Accurately document repairs and completed service work.
• Maintain a clean, organized, and safe work environment.
• Participate in ongoing technical and manufacturer training.

What We’re Looking For

• Entry-level through experienced diesel technicians.
• Diesel or automotive technical training is preferred.
• Knowledge of diesel engines, mechanical and electrical systems, air brakes, and aftertreatment systems.
• Strong mechanical aptitude and troubleshooting skills.
• Ability to read service manuals, wiring diagrams, and schematics.
• Valid driver’s license required.
• ASE certifications, OEM training, and CDL are a plus.
• Ability to lift 50–75 lbs. and work in typical heavy‑duty shop conditions.

Why I-State Truck Center?

• Competitive pay is based on experience and skill level.
• Manufacturer and OEM training.
• Exposure to a wide range of heavy‑duty diagnostics and repairs.
• Experienced, supportive service team.
• Long‑term career opportunities with I-State Truck Center.

Employee Benefits

• Competitive wages – be paid your worth
• Uniforms provided and cleaned
• Tuition assistance for ongoing education and career growth
• Medical, dental, and vision coverage starting the first of the month following hire
• PTO accrual starting day one
• 401(k) with company match
• Company‑paid short‑term and long‑term disability
• Company‑paid life insurance
• Healthiest You virtual healthcare
• PPE reimbursement (safety glasses and safety boots)
• Employee discounts on products and services
• Employee Assistance Program (EAP) – free 24/7 access
• Paid health and wellness screening

This job description is not intended to be an exhaustive list of duties and may be modified at any time.

Interstate Companies is an Equal Opportunity Employer. All qualified applicants are encouraged to apply.