Journeyman Diesel Mechanic

Journeyman Diesel MechanicI-State Truck Center is a leading provider of heavy-duty truck sales, parts, and service, specializing in Freightliner, Western Star, and Thomas Built Bus products. We proudly support commercial fleets, owner-operators, and businesses across the region. Our Billings, Montana location, offers a fast-paced, professional shop environment for skilled diesel technicians looking to apply their expertise and continue growing their careers.The ideal candidate has proven heavy-duty diesel truck experience and a strong background in diagnostics, repair, and preventive maintenance.

This role offers competitive wages, a consistent Wednesday–Saturday schedule, and long-term stability within a growing organization.Key ResponsibilitiesDiagnose 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).Preventive Maintenance: Perform routine maintenance including oil changes, filter replacements, brake adjustments, tire inspections, and chassis lubrication to ensure reliability and regulatory compliance.Component Repairs: Repair or replace critical components such as diesel engines, transmissions, differentials, turbochargers, and braking systems.Welding and Fabrication: Perform minor welding, cutting, or fabrication work to repair or modify frames and components as needed.Documentation: Complete accurate service reports, document parts usage, and record maintenance activities for warranty, billing, DOT compliance, and inventory tracking.Customer Interaction: Communicate with drivers and fleet managers regarding repairs, recommendations, and service outcomes.Safety Compliance: Follow OSHA, DOT, manufacturer, and company safety guidelines while maintaining a clean and organized work environment.Tool & Equipment Management: Maintain shop tools, diagnostic equipment, and service areas to ensure operational readiness.QualificationsEducation: High school diploma or equivalent; technical diploma or certification in diesel or heavy-duty truck repair preferred.Experience: 2–5+ years of hands-on heavy-duty diesel truck experience is requiredExperience with brands such as Freightliner, Kenworth, Peterbilt, Volvo, Mack, or similarTechnical Skills: Strong knowledge of diesel engines, electrical systems, hydraulics, and ECM diagnosticsProficiency with diagnostic software and hand/power toolsAbility to read and interpret technical manuals, wiring diagrams, and schematicsSoft Skills: Strong problem-solving ability and attention to detailEffective communication and customer service skillsCertifications (Preferred): Manufacturer training (Cummins, Detroit Diesel, Paccar) or ASE Heavy-Duty certifications (T2–T8)Physical Requirements: Ability to lift 50–75 lbs., work under trucks, and perform duties in various shop conditionsLicense: Valid driver's license requiredCDL strongly preferredEmployee BenefitsCompetitive wages – be paid your worthUniforms provided and professionally cleanedTool program availableTuition assistance for ongoing education and career growthMedical, dental, and vision coverage starting the first of the month following hirePTO accrual starting day one6 paid holidays plus 2 floating holidays401(k) with company matchCompany-paid short-term and long-term disabilityCompany-paid life insuranceHealthiest You virtual healthcarePPE reimbursement (safety glasses and safety boots)Pet insuranceEmployee discounts on products and servicesEmployee Assistance Program (EAP) – free 24/7 accessPaid health and wellness screeningThis job description is not designed to cover a comprehensive listing of activities, duties, or responsibilities. Duties and responsibilities may change at any time.Interstate Companies is an Equal Opportunity Employer.Military Friendly Hiring.