DIESEL SERVICE TECH

Tntx, Llc; Farmington (MO); On-site; USD 55,000 - 75,000; Full time

Benefits offered by this job

401k with company match

Medical, Prescription, Dental & Vision

Life insurance

Short/Long Term Disability

Paid Time Off

Training & career development

Job summary

Lonestar Truck Group in Farmington, Missouri is seeking a skilled Heavy-Duty Technician to join our Western Star dealership. You will perform vehicle repair and maintenance according to company and manufacturer standards, using your diagnostic skills to ensure first-time fixes.

The ideal candidate will hold Detroit Diesel/Cummins certifications or ASE Heavy Duty certifications, with a minimum of three years in a truck dealership. CDL is a plus.

Qualifications

• Minimum 3 years truck dealership experience.
• Detroit Diesel and/or Cummins certification preferred.
• CDL preferred.
• Ability to lift 50 pounds and work safely.

Responsibilities

• Perform vehicle repair and maintenance per manufacturer standards.
• Diagnose issues and perform repairs in a timely manner.
• Maintain a clean, safe bay and document work performed.

Skills

Team player

Customer service mindset

Attention to safety

Pride in workmanship

Education

ASE Heavy Duty Certifications

Tools

Cummins

Detroit Diesel

ASE Heavy Duty Certifications

Job description

Posted Saturday, September 5, 2026 at 4:00 AM

The Lonestar Truck Group and TAG Truck Centers havebuilt an excellent reputation within the heavy truck industry.Much of the success can be attributed to our employees who share a common vision: A hassle free, value added transaction for every customer every time.

We’re looking for a Heavy-Duty Technician who wants more than just a job — someone who wants a career with a strong team, steady work, and the kind of income that lets you enjoy the things you’ve worked hard for.

Build Your Career. Earn Big. Enjoy the Ride.

If you take pride in fixing it right the first time…
If you believe a clean bay and a solid day’s work still matter…
If you want a paycheck that lets you enjoy the rewards of hard work…

This is where skill meets opportunity.

An opportunity for a Service Technician currently exists in our Farmington, Missouri Western Star dealership. The focus of this position will be to perform vehicle repair and maintenance work as assigned in accordance with company and manufacturer standards. Detroit, Cummins, and/or ASE Heavy Duty certifications preferred with a minimum of three years truck dealership experience required.

We are looking for a technician who will be a dependable, responsible team player with the right skill set and a positive attitude. People who are passionate about providing the highest level of customer service will surround you everyday.

The ideal candidate will have:

• Cummins, Detroit Diesel and/or Heavy-Duty certification strongly preferred
• Minimum 3 years truck dealership experience
• Freightliner experience helpful but not required
• Flat rate/commission experience preferred
• CDL preferred
• Ability to lift 50 pounds
• Own necessary basic tools

We offer competitive benefits including a 401k program with company match, Medical, Prescription, Dental & Vision insurance, company paid Life insurance, Short and Long Term Disability insurance, Paid Time Off, and a strong commitment to training.

We are an Equal Opportunity Employer. Pre-employment drug testing/background check will help assure that we build a diverse team of people who can best work with others and serve our customer needs.