Diesel Service Technician / Mechanic

Murphy-Hoffman Company; Chattanooga (TN); On-site; USD 50,000 - 70,000; Full time

Benefits offered by this job

Competitive Salary

Medical Insurance

Dental Insurance

Paid Time Off

401k with Employer Match

Flexible Spending Account

On-the-Job Training

Job summary

Murphy-Hoffman Company, LLC in Chattanooga, TN, is seeking a Diesel Service Technician/Mechanic to perform heavy‑duty mechanical repairs under supervision. Training in a development program aims to achieve Service Journeyman status.

The role includes engine, fuel, electrical, transmission and brake work, with emphasis on safety and proper use of tools. CDL is preferred, with opportunity for advancement and on-the-job training.

Qualifications

• General mechanical duties and repairs.
• Troubleshooting minor to moderate issues.
• Working with engineers and supervisors to ensure safe repairs.

Responsibilities

• Perform general mechanical duties and repairs on diesel trucks.
• Assist with engine, fuel, electrical, transmissions, and brake systems as needed.
• Attend training sessions and operate safely in a shop environment.
• Maintain organized work area and report additional repair needs to foreman.

Skills

General mechanical duties

Troubleshooting

Team collaboration

Education

Vocational training

Job description

Job Details

Job Title: Diesel Service Technician / Mechanic

Business Function: Service

Branch Name: MHC Kenworth-Chattanooga

Date: 09-29-2026

Address: 7831 Lee Highway

City: Chattanooga

State: TN

Job Overview & Essential Functions

Murphy-Hoffman Company, LLC is North America's largest Kenworth truck dealership group and leasing group. As MHC continues to grow, we have an opening for a Diesel Service Technician / Mechanic. The role of the Diesel Service Technician / Mechanic performs heavy‑duty mechanical repair under general supervision, receiving on the job training in a development program to achieve Service Journeyman status.

• Performs and/or assists in the performance of general mechanical duties.
• Gains experience by working on the following items with minimal supervision: engine overhaul, fuel systems, electrical systems, transmissions, cooling systems, chassis, brakes, engine tune‑up, and general maintenance.
• Works on major components with close supervision.
• Performs trouble shooting on minor problems.
• Attends training sessions and meetings.
• Maintains a neat and orderly working area, and proper handling of company tools.
• Advises the Shop Foreman if additional repair work is necessary.
• Follows safe work practices and procedures, uses safety equipment when required, responds to suggestions for working safely and seeks assistance when necessary.
• Performs other duties as assigned by supervisor.

SAFETY-SENSITIVE

This position has been designated as a safety‑sensitive position. Any person performing the position while under the influence of marijuana or any other illegal drug may constitute a threat to health or safety or in which a lapse of attention could result in injury, illness, or death, including without limitation a position that includes the operating, repairing, maintaining, or monitoring of heavy equipment, machinery, aircraft, motorized watercraft, or motor vehicles or handling of hazardous materials and/or waste as part of the job duties.

Qualifications

• CDL preferred.
• Minimum three years hands‑on experience or graduate of vocational courses.
• A/C, Brake and DOT Annual Inspector Certifications required.
• Necessary tools to perform position responsibilities.

Benefits

• Competitive Salary
• Medical, Dental and Prescription Insurance
• Disability and Life Insurance
• Paid Time Off program
• 401k and Profit Sharing with Employer Match
• Flexible Spending Account
• Internal Promotion Opportunities
• On the Job Training

About Us

MHC is an expansion of the original company, Ozark Kenworth, Inc. Ozark Kenworth started in Springfield, Missouri, in January 1975. Opening for business without a Parts or Service department and only three employees in a temporary facility. From there, the company grew and expanded. MHC is now a multi‑state network of full‑service diesel truck dealerships, leasing and rental operations, transport refrigeration locations, and a finance company which offers a complete array of finance and insurance services. We believe in fostering an environment that helps employees realize their full potential - a place where you can grow as a person and a professional.

Equal Opportunity Employer / Veterans / Disabled