Diesel Mechanic

Dearborn•Dearborn, MI

36d•Onsite

About The Position

Tri-County Truck Centers is looking for a skilled, motivated Diesel Mechanic to diagnose, repair, and maintain light, medium, and heavy-duty trucks and buses across our Southeast Michigan locations. If you take pride in precision work, thrive in a fast-paced shop environment, and want to grow your career with a team that invests in your success — we want to hear from you. On-the-job factory training, certification opportunities, and a clear path for advancement await the right candidate. Tri-County Truck Centers is a family-owned commercial truck dealership that has proudly served the Michigan business community since 1946 — now spanning over 75 years. Originally founded as C&S Motors, Inc. in Flint, Michigan, the company has grown into the authorized International brand dealership for Southeast Michigan, with five branch locations in Dearborn, Flint, Jackson, Livonia, and Warren. Through our Idealease division at each branch, we provide full-service truck leasing, contract maintenance, and short- and long-term truck rental. With three generations of family actively involved in day-to-day operations, Tri-County remains deeply rooted in Michigan and committed to the communities we serve. Our team is guided by a straightforward philosophy: treat every customer’s interaction as an opportunity to earn a lifelong relationship.

Requirements

At least one year of hands-on experience as a diesel technician — dealership or fleet experience preferred.
Michigan State Certifications in Heavy Duty Truck (Trainee Permit accepted).
Knowledge of diesel engine repair and maintenance, powertrains, and electrical systems.
Strong diagnostic skills and attention to detail.
Good verbal, written, and computer skills.
Demonstrates good character and work ethic.
Ability to follow manufacturer's policies and procedures for labor operations, time, and repair order documentation when performing warranty repairs.
Must possess your own tools.
Chauffeur's License required (CDL a plus).
Must be able to reliably commute to one of our Southeast Michigan locations — on-site position.
Qualified applicants must be able to pass a pre-employment drug screen, physical, and background check.

Nice To Haves

ASE, Navistar, or Cummins Certifications.
Previous dealership or fleet maintenance experience.
Familiarity with International Trucks diagnostic systems or platforms such as ServiceMaxx.

Responsibilities

Diagnose — identify mechanical, electrical, and powertrain issues on light, medium, and heavy-duty trucks and buses using diagnostic tools and equipment.
Repair — perform hands-on repairs to diesel engines, powertrains, electrical systems, and related components following manufacturer specifications.
Maintain — conduct scheduled preventive maintenance to keep fleet vehicles operating safely and efficiently.
Document — accurately complete repair orders, warranty documentation, and labor operation records in accordance with manufacturer policies and procedures.
Inspect — perform thorough pre- and post-repair inspections to verify quality and safety of all work performed.
Collaborate — work alongside fellow technicians and service advisors to deliver timely, high-quality results for our customers.