Experienced Diesel Technician

Campbell Supply Company; South Brunswick (NJ); On-site; USD 40,000 - 100,000; Full time

Benefits offered by this job

Competitive pay

Monthly bonus

Employee referral program

Paid vacation and holidays

Medical, dental, and vision insurance

401(k) with company match

Employee discounts

Uniforms and laundry service

Factory training

Career advancement

Job summary

Campbell Supply, the largest Freightliner dealership in the Tri-State Area, is seeking experienced diesel technicians for a long-term career in South Brunswick, NJ. The team values technical excellence, ongoing training, and rewarding performance, with Cummins and Allison certifications highly encouraged.

Join a family-owned dealership with seven regional locations, OEM training access, and a strong focus on professional development.

Qualifications

• 5+ years of experience as a diesel technician or equivalent.
• Advanced diagnostic and troubleshooting skills.
• Ability to independently diagnose and repair engine, transmission, electrical, drivability, chassis, and aftertreatment systems.

Responsibilities

• Diagnose, document, and repair engine, transmission, and major component fault codes using OEM software and diagnostic tools.
• Perform troubleshooting, maintenance, and repairs on diesel engines, drivetrains, electrical systems, chassis components, and aftertreatment systems.
• Complete preventative maintenance and vehicle reconditioning.

Skills

Diesel diagnostics

Troubleshooting

Engine repair

Communication

Teamwork

Independent work

Tools

OEM diagnostic software

Job description

Are you a skilled diesel technician looking for a long‑term career with a respected, industry‑leading dealership? Join Campbell Supply, the largest Freightliner dealership in the Tri‑State Area, where your expertise is recognized, your hard work is rewarded, and your career growth is supported. We're seeking experienced diesel technicians who thrive in a fast‑paced environment and take pride in diagnosing and repairing today's advanced commercial vehicles. Technicians with Cummins and Allison certifications are highly encouraged to apply. Experience servicing Cummins engines and Allison transmissions is a major plus.

Location: South Brunswick, NJ

About Campbell Supply

Campbell Supply is a family‑owned dealership with a proud legacy dating back to 1967. With seven locations throughout the region, we are a trusted leader in the commercial truck and emergency vehicle industries. Our product lineup includes Freightliner, Western Star, Isuzu, Spartan, and KME Emergency Vehicles.

As part of our team, you'll have access to OEM diagnostic tools, Freightliner factory training, and ongoing professional development opportunities. We invest in our technicians and provide the resources needed to succeed in today's rapidly evolving diesel service environment.

Diesel Technician Responsibilities

• Diagnose, document, and repair engine, transmission, and major component fault codes using OEM software and diagnostic tools.
• Perform troubleshooting, maintenance, and repairs on diesel engines, drivetrains, electrical systems, chassis components, and aftertreatment systems.
• Complete preventative maintenance and vehicle reconditioning.
• Demonstrate advanced technical knowledge and strong problem‑solving abilities.
• Attend OEM and dealership training programs, both online and in person, as required.
• Maintain accurate repair documentation and follow warranty procedures.

Qualifications

• 5+ years of experience as a diesel technician, fleet mechanic, heavy equipment mechanic, or equivalent.
• Advanced diagnostic and troubleshooting skills.
• Ability to independently diagnose and repair engine, transmission, electrical, drivability, chassis, and aftertreatment systems.
• Experience using OEM diagnostic software and electronic troubleshooting tools.
• Formal diesel training and OEM certifications preferred.
• Cummins and Allison certifications are highly desirable.
• Strong communication and teamwork skills.
• Ability to work independently and manage multiple priorities in a fast‑paced environment.
• Commitment to continuous improvement and professional development.

Benefits

• Competitive compensation: $40,000 - $100,000+ annually (based on experience and certifications)
• Monthly bonus opportunities
• Employee referral program
• Paid vacation and holidays
• Comprehensive medical, dental, and vision insurance
• 401(k) with company match
• Employee discounts through preferred vendors
• Company‑provided uniforms and laundry service
• Extensive factory‑sponsored online and in‑person training
• Career advancement opportunities across our seven‑location network

Apply Today

If you're an experienced diesel technician ready to join a growing organization that values technical excellence and rewards performance, we'd love to hear from you. Candidates with Cummins and Allison certifications are strongly encouraged to apply.