Diesel Technician (Medium & Heavy Duty)

About the role

At ACTS Fleet Maintenance, we're more than a fleet service company—we're a team of dedicated professionals committed to keeping commercial fleets safe, reliable, and on the road. Founded on faith, integrity, and a passion for exceptional service, ACTS has become one of the fastest-growing commercial fleet maintenance companies. We provide preventive maintenance, inspections, diagnostics, and repair services to companies that depend on their vehicles every day. As we continue expanding into new markets, we're looking for talented individuals who want to grow with us. Our culture is built on our core values of Safety, Integrity, Quality, Urgency, Professionalism, Accountability, Teamwork, and Customer Service. We believe that investing in our employees is the key to our success, which is why we offer opportunities for professional development, career advancement, ongoing training, and leadership growth. Whether you're an experienced technician, a skilled leader, or beginning your career, you'll find an environment where your work matters, your contributions are recognized, and your future is supported. If you're looking for more than just a job—if you're looking for a long-term career with a company that's Driven to Safety and committed to excellence—we'd love to have you join our team.

Work Location: In-person (Shop in Johnson City, TN) and on the road (Mobile Field Service).

Responsibilities

• Advanced Diagnostics: Reading fault codes and analyzing data on late-model trucks using OEM and aftermarket scan tools.
• System Repairs: Diesel engines, brake systems, suspension, steering, drivelines, and transmissions.
• Electrical & Emissions: Troubleshooting complex electrical systems and emissions components.
• Preventative Maintenance: Conducting rigorous DOT inspections, fluid changes, and brake checks.
• Field Ownership: Representing ACTS Fleet professionally while diagnosing and repairing equipment directly on-site.

Requirements

• Proven Experience: Strong hands-on experience as a medium/heavy-duty diesel technician.
• Diagnostic Skills: Advanced proficiency with diagnostic software and mechanical troubleshooting.
• Independence: Capability to handle complex issues alone and follow structured shop processes.
• Licensing: Valid driver's license required; CDL preferred, but not required.

Benefits

• Paid OEM Training: Continuous technical education including Mitsubishi, Cummins, and NAPA.
• Modern Operations: Clean facility, updated equipment, and well-supported mobile field service vehicles.
• Career Growth: Clear advancement paths through our proprietary Technician Growth Program©.
• Premium Benefits: Comprehensive health coverage, retirement match, and paid uniforms.
• 401(k) with company matching.
• Health, Dental, and Vision insurance.
• Health Savings Account (HSA).