Diesel Mechanic

Istate Truck, Inc.; Sioux Falls (SD); Hybrid; USD 52,000 - 76,000; Full time

Benefits offered by this job

Health insurance options

Flexible time off

401(k) company match

Membership banking with Wells Fargo

Dell discount program

New vehicle discounts with GM and Ford

Company-paid life & disability

Tuition assistance & career growth

Uniforms provided & cleaned

Boot & safety glasses reimbursement

Employee discounts & wellness programs

PTO starting day one

Job summary

I-State Truck Center in Sioux Falls, SD, is seeking a skilled Heavy-Duty Diesel Truck Mechanic to diagnose, repair, and maintain diesel trucks. You will work with Freightliner, Kenworth, Peterbilt, Volvo, and Mack equipment, performing preventive maintenance and repairs to ensure reliability and safety.

We offer competitive pay, full benefits starting next month, and opportunities for career growth within a stable, team-focused Midwest dealership and service provider.

Qualifications

• 2+ years of heavy-duty diesel repair experience.
• Strong troubleshooting and diagnostic skills.
• Experience with Freightliner, Kenworth, Peterbilt, Volvo, or Mack.
• Ability to read schematics and technical manuals.
• Basic welding/fabrication skills (preferred).
• Valid driver’s license (CDL preferred).
• Diesel tech certification or ASE (T2–T8) is a plus.

Responsibilities

• Diagnose & repair mechanical, electrical, and hydraulic issues on heavy-duty diesel trucks.
• Use advanced diagnostics (Cummins Insite, Detroit Diesel Diagnostic Link, OEM software).
• Perform preventive maintenance (oil, brakes, inspections, lubrication).
• Repair/replace major components (engines, transmissions, differentials, turbos).
• Complete work orders and documentation for warranty and compliance.
• Communicate repairs and recommendations to customers.
• Maintain a safe, clean, and organized workspace.

Skills

Diesel repair

Diagnostics

Truck brands

Schematics reading

Welding

CDL preferred

ASE certification

Job description

I-State Truck Centers offer exciting career opportunities in a variety of fields ranging from diesel technicians and purchasing specialists to sales professionals and industrial managers. Join our team for a challenging career with strong growth potential. We value our employees and invest in them with training, technology, and generous benefits packages.

• Broad range of health insurance options
• Flexible time off
• 401(k) retirement plan with up to 25 percent company match

Other Perks

• Membership banking with Wells Fargo
• Dell discount program
• New vehicle discount programs with General Motors and Ford

Current Open Positions at Interstate Companies

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

Join a leading Midwest truck dealership and service provider.
At I-State Truck Center, we specialize in Freightliner, Detroit Diesel, Isuzu Truck, Battle Motors, and Fruehauf Trailers—and we’re looking for skilled Diesel Technicians who take pride in quality work and want to grow their careers in a stable, team-focused environment.

What You’ll Do

• Diagnose & repair mechanical, electrical, and hydraulic issues on heavy-duty diesel trucks
• Use advanced diagnostics (Cummins Insite, Detroit Diesel Diagnostic Link, OEM software)
• Perform preventive maintenance (oil, brakes, inspections, lubrication)
• Repair/replace major components (engines, transmissions, differentials, turbos)
• Complete work orders and documentation for warranty and compliance
• Communicate repairs and recommendations to customers
• Maintain a safe, clean, and organized workspace

What We’re Looking For

• 2+ years of heavy-duty diesel repair experience
• Strong troubleshooting and diagnostic skills
• Experience with trucks like Freightliner, Kenworth, Peterbilt, Volvo, or Mack
• Ability to read schematics and technical manuals
• Basic welding/fabrication skills (preferred)
• Valid driver’s license (CDL preferred)
• Diesel tech certification or ASE (T2–T8) is a plus

Why Join I-State Truck Center?

• Competitive pay — paid for your experience
• Full benefits starting the 1st of the next month
• 401(k) with company match
• PTO starting day one
• Paid holidays + floating holidays
• Company-paid life & disability insurance
• Tuition assistance & career growth opportunities
• Uniforms provided & cleaned
• Boot & safety glasses reimbursement
• Employee discounts + wellness programs

Physical Requirements

• Lift up to 75 lbs
• Work in shop and outdoor conditions
• Perform physically active tasks throughout the shift

About Us
I-State Truck Center is part of Interstate Companies—committed to delivering best-in-class service to fleets, owner-operators, and businesses across the Midwest.

Interstate Companies is an Equal Opportunity Employer and proudly supports Military-Friendly hiring.