Medium & Heavy-Duty Diesel Technician

ACTS Fleet is hiring experienced Medium & Heavy-Duty Diesel Technicians in Knoxville, TN—and we built this role for techs who know their craft and want long-term stability.

If you’re confident with diagnostics, preventative maintenance, and medium/heavy truck repairs, this is a shop where your skills are respected and your time matters.

You’ll service medium to heavy-duty commercial trucks and fleet vehicles, focusing on uptime, safety, and quality repairs—not rushed guesswork.

Day-to-Day Work Includes:

• PM services on fleet trucks (DOT inspections, fluids, filters, brakes)

• Diagnosing and repairing medium & heavy-duty diesel engines

• Advanced computer diagnostics on late-model trucks

• Brake systems, steering & suspension, driveline, and transmissions

• Engine accessories, electrical systems, and emissions components

• Verifying repairs through inspections and test drives

• Using shop-provided hoists, hydraulic jacks, and modern tooling

• Reading fault codes and diagnostic data to make accurate repairs the first time

• Solid hands-on experience as a diesel technician

• Strong diagnostic skills (not just parts swapping)

• Familiarity with OEM and aftermarket scan tools

• Ability to work independently and follow repair procedures

• CDL preferred, not required

• Pay That Respects Your Skill
  Earn 20–30% above industry average

• Weekly Pay
  Paid every Friday

• Work-Life Balance That’s Real
  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

• Clean, Modern Shop
  Professional facility with up-to-date equipment

• Career Advancement
  Clear leadership paths through our Technician Growth Program©

If you’re a medium or heavy-duty diesel tech looking for better pay, better hours, and a shop that values your expertise, ACTS Fleet is ready for you.