Medium & Heavy Duty Diesel Technician

Acts Fleet Maintenance; Nashville (TN); On-site; USD 30,000 - 47,000; Full time

Benefits offered by this job

401(k)

401(k) matching

Dental insurance

Health insurance

Life insurance

Paid time off

Vision insurance

Job summary

ACTS Fleet is seeking an experienced Diesel Technician (Medium & Heavy-Duty) in Nashville. You will work on medium and heavy-duty commercial trucks both in-shop and in the field, focusing on uptime, safety, and first-time fixes.

Expect autonomy with clear expectations and a professionally structured environment. Requirements include strong diesel diagnostic ability, hands-on experience, and North Carolina State Inspection Certification.

Qualifications

• Experience as a diesel technician with hands-on diagnostics and repair.
• Ability to diagnose and repair diesel engines and systems.
• Strong communication and accountability in a structured shop/field environment.

Responsibilities

• Perform preventative maintenance and inspections (DOT, fluids, filters, brakes).
• Diagnose and repair diesel engines and systems.
• Conduct advanced diagnostics on late-model trucks; repair brakes, suspension, steering, driveline, transmissions.
• Work in-shop and in-field with focus on uptime and safety.
• Read fault codes and verify repairs through tests and road drives.

Skills

Diesel diagnostics

Field service

Clear communication

Accountability

Education

North Carolina State Inspection Certification

Tools

OEM scan tools

Aftermarket scan tools

Job description

Diesel Technician (Medium & Heavy-Duty)

At ACTS Fleet, we built this role for experienced diesel technicians who know their craft, take pride in their work, and want to work in a shop where performance, structure, and respect actually align.

What Makes This Different

High-performing technicians shouldn’t be held back by the environment around them.

At ACTS Fleet, everything is built on two principles: clear expectations and trust in execution.

What that looks like:

• Structured processes and consistent standards across the board
• Direct, clear communication with leadership
• The autonomy to do your job - without micromanagement

The Work

You’ll work on medium and heavy-duty commercial trucks and fleet vehicles both in-shop and in the field - with a focus on uptime, safety, and getting repairs done right the first time.

Day-to-day responsibilities include:

• Preventative maintenance (DOT inspections, fluids, filters, brakes)
• Diagnosing and repairing diesel engines
• Advanced diagnostics on late-model trucks
• Brake systems, suspension, steering, driveline, and transmissions
• Electrical systems and emissions components
• Reading fault codes and diagnostic data accurately
• Verifying repairs through inspections and test drives

Mobile Service Work:

• Diagnose and repair equipment directly in the field
• Work independently with a high level of ownership
• Represent ACTS Fleet with professionalism and reliability

What You Bring

• Strong hands-on experience as a diesel technician
• Advanced diagnostic ability
• North Carolina State Inspection Certification
• Familiarity with OEM and aftermarket scan tools
• Ability to work independently and follow structured processes
• Clear communication and accountability
• CDL preferred, not required

This role is built for technicians who:

• Handle complex diagnostics without relying on others
• Take ownership of their work - shop or field
• Prefer working in an environment with consistent standards
• Want autonomy without chaos

Why Technicians Choose ACTS Fleet

Pay That Matches Your Output

Earn 20-30% above industry average

Weekly Pay

Paid every Friday

Real Work-Life Balance

3-day weekends every other week

Benefits That Matter

Health insurance, PTO, paid uniforms, and more

Paid OEM Training

Mitsubishi, Cummins, NAPA & ongoing technical education

Modern Shop + Mobile Operations

Clean facility, updated equipment, and well‑supported field service

Career Growth

Clear advancement paths through our Technician Growth Program©

Bottom Line

Stronger technicians should be doing higher-level work—in an environment that recognizes it.

If you’re outperforming your current shop and want structure, autonomy, and a team that operates at your level, this is your next step.

If you know diesel, we want to talk

Benefits:

• 401(k)
• 401(k) matching
• Dental insurance
• Health insurance
• Life insurance
• Paid time off
• Vision insurance

Work Location: In person