Diesel Technician — Heavy-Duty Diagnostics & Repairs

Interstate Companies, Inc.; Billings (MT); On-site; USD 60,000 - 85,000; Full time

Benefits offered by this job

Competitive wages

Uniforms provided and cleaned

Tuition assistance

Job summary

Interstate Power Systems in Billings, MT is seeking a Journeyman Diesel Technician to diagnose, repair, and maintain heavy trucks and equipment. The role emphasizes diagnostics, preventive maintenance, and timely repairs with a focus on safety and quality.

You will work with OEM platforms such as Detroit Diesel, Cummins, CAT, MTU, Volvo Penta, and others, performing engine and drivetrain work, electrical diagnostics, and minor welding.

Qualifications

• 2–5+ years of hands-on diesel technician experience required.
• Experience with Detroit Diesel, Cummins, CAT, MTU, Volvo Penta, or comparable products preferred.
• Ability to read and interpret service manuals, wiring diagrams, schematics, and technical documentation.
• Valid driver's license required; CDL preferred

Responsibilities

• Diagnose and Repair: Troubleshoot mechanical, hydraulic, electrical, and electronic systems on heavy-duty trucks and equipment using diagnostic software and schematics.
• Preventive Maintenance: Perform routine maintenance such as oil changes, filter replacements, brake inspections, fluid services, and inspections.
• Component Repairs: Repair or replace major components including engines, transmissions, differentials, aftertreatment systems, hydraulic components, steering, and braking systems.
• Electrical Diagnostics: Diagnose and repair electrical systems, engine controls, sensors, wiring harnesses, and ECMs.
• Welding and Fabrication: Perform minor welding, cutting, and fabrication for repairs.
• Documentation: Complete repair orders, maintenance records, and warranty documentation.
• Customer Interaction: Communicate findings and recommendations with customers and service personnel.
• Safety Compliance: Adhere to OSHA and company safety standards.

Skills

Diesel engine knowledge

Diagnostics

Troubleshooting

Heavy equipment repair

Electrical systems

Education

High school diploma or equivalent

Technical diploma/certification in diesel technology or heavy equipment repair

Tools

OEM diagnostic software

Shop diagnostic tools

Welding equipment

Job description

Interstate Power Systems in Billings, MT is seeking a Journeyman Diesel Technician to diagnose, repair, and maintain heavy trucks and equipment. The role emphasizes diagnostics, preventive maintenance, and timely repairs with a focus on safety and quality.

You will work with OEM platforms such as Detroit Diesel, Cummins, CAT, MTU, Volvo Penta, and others, performing engine and drivetrain work, electrical diagnostics, and minor welding.