Heavy-Duty Diesel Truck Mechanic

Career Opportunities with Interstate Companies Inc

Careers At Interstate Companies Inc

Current job opportunities are posted here as they become available.

Job Title: Heavy-Duty Diesel Truck Mechanic
Location: Sioux Falls South Dakota
Company: I-State Truck Center

I-State Truck Center is a leading provider of heavy-duty truck sales, parts, and service in the Midwest, specializing in Freightliner, Western Star, and Detroit Diesel products. With a commitment to excellence and customer satisfaction, we serve commercial fleets, owner-operators, and businesses across South Dakota and beyond. Our Sioux Falls location is at the heart of our operations, offering a dynamic environment for skilled tradespeople to grow their careers.

The ideal candidate will have a strong background in diesel engine repair, diagnostics, and maintenance, with a focus on delivering high-quality service to ensure customer satisfaction. This role offers highly competitive wages and opportunities for career growth in a dynamic work environment.

• Diagnose and Repair
  :
  Troubleshoot complex mechanical, hydraulic, electrical, and electronic systems on heavy-duty diesel trucks using advanced diagnostic tools, schematics, and technical manuals (e.g., Cummins Insite, Detroit Diesel Diagnostic Link).
• Perform Maintenance
  :
  Conduct routine preventive maintenance, including oil changes, filter replacements, tire inspections, brake adjustments, and chassis lubrication to ensure truck reliability and compliance with federal and state regulations.
• Component Replacement
  :
  Replace or repair critical components such as diesel engines, transmissions, differentials, turbochargers, or brake systems.
• Welding and Fabrication
  :
  Perform minor welding, cutting, or fabrication tasks to repair or modify truck frames, bodies, or components as needed.
• Documentation
  :
  Complete detailed service reports, document parts used, and record maintenance activities for warranty, billing, DOT compliance, and inventory purposes.
• Customer Interaction
  :
  Communicate with fleet managers or drivers to explain repairs, provide maintenance recommendations, and ensure satisfaction with service.
• Safety Compliance
  :
  Adhere to OSHA, DOT, and company safety regulations, maintain a clean work environment, and follow manufacturer protocols.
• Tool and Equipment Management
  :
  Maintain and organize tools, service vehicles, and diagnostic equipment to ensure operational readiness for field service.

• Education
  :
  High school diploma or equivalent; technical diploma or certification in diesel mechanics or heavy-duty truck repair preferred.
• Experience
  : 2–5 years of experience repairing and maintaining heavy-duty diesel trucks (e.g., Kenworth, Peterbilt, Freightliner, Volvo, or Mack).
• Skills
  :
  • In-depth knowledge of diesel engines, hydraulic systems, electrical systems, and electronic controls (e.g., ECM diagnostics).
  • Proficiency with diagnostic tools (e.g., Cummins Insite, Detroit Diesel Diagnostic Link, or OEM software) and hand/power tools.
  • Ability to read and interpret technical manuals, wiring diagrams, and hydraulic schematics.
  • Strong problem-solving skills and attention to detail.
  • Basic welding and fabrication skills (preferred).
  • Excellent communication and customer service skills for interacting with fleet managers and drivers.
• Certifications
  :
  Manufacturer-specific training (e.g., Cummins, Detroit Diesel, Paccar) or ASE Heavy Duty Truck certifications (e.g., T2–T8 series) are a plus.
• Physical Requirements
  :
  Ability to lift heavy parts (up to 50–75 lbs.), work in confined spaces (e.g., under truck chassis), and perform tasks in various weather conditions.
• Driver’s License
  :
  Valid driver’s license required; CDL (Commercial Driver’s License) with appropriate endorsements strongly preferred.

• Uniforms – fully supplied by Interstate including cleaning!
• Tool program – available
• Tuition assistance – for educational and ongoing career growth
• Health, dental and vision coverage – begins on the first day of the following month.
• Paid Time Off (PTO) – starts accruing day one of your full-time employment.
• Holidays – 6 Holidays and 2 Floating Holidays per year
• 401(K) – with company…