Heavy Duty Diesel Technician

Interstate Companies, Inc.

. Troubleshoot complex mechanical, hydraulic, electrical, and electronic systems on heavy-duty diesel trucks using advanced diagnostic tools, schematics, and technical manuals .

Posted 11/5/2026full-timeBismarck • North Dakota • United StatesJuniorMid-LevelWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in troubleshooting and repairing heavy-duty diesel trucks, including proficiency with diagnostic tools and adherence to safety regulations. Strong communication skills facilitate effective interaction with fleet managers and drivers while maintaining detailed service documentation.

Highest-signal resume keywords

Diesel Engine RepairDiagnostic Tool ProficiencyPreventive MaintenanceWelding and Fabrication SkillsASE Heavy Duty Truck Certification

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

Troubleshooting Mechanical SystemsRepairing Hydraulic SystemsElectrical System MaintenanceReading Technical ManualsInterpreting Wiring DiagramsPerforming Preventive MaintenanceRepairing TransmissionsRepairing TurbochargersRepairing Brake SystemsMaintaining Service Reports

Soft Skills

Problem-Solving SkillsAttention to DetailCommunication SkillsCustomer Service Skills

Tools & Technologies

Cummins InsiteDetroit Diesel Diagnostic LinkOEM SoftwareHand ToolsPower Tools

Certifications & Qualifications

Technical Diploma in Diesel MechanicsASE Heavy Duty Truck CertificationValid Driver's LicenseCDL with Endorsements

Industry Keywords

Heavy-Duty Diesel TrucksDOT ComplianceOSHA RegulationsFleet ManagementPreventive Maintenance

About the role

Key responsibilities & impact

Troubleshoot complex mechanical, hydraulic, electrical, and electronic systems on heavy-duty diesel trucks using advanced diagnostic tools, schematics, and technical manuals
Conduct preventive maintenance including oil changes, filter replacements, tire inspections, brake adjustments, and chassis lubrication
Replace or repair diesel engines, transmissions, differentials, turbochargers, and brake systems
Perform minor welding, cutting, and fabrication tasks on truck frames, bodies, or components
Complete service reports, document parts used, and record maintenance activities for warranty, billing, DOT compliance, and inventory purposes
Communicate with fleet managers and drivers to explain repairs and provide maintenance recommendations
Adhere to OSHA, DOT, company safety regulations, and manufacturer protocols
Maintain a clean work environment
Maintain and organize tools, service vehicles, and diagnostic equipment for field-service readiness

Requirements

What you’ll need

High school diploma or equivalent required
Technical diploma or certification in diesel mechanics or heavy-duty truck repair preferred
2–5 years of experience repairing and maintaining heavy-duty diesel trucks and/or equipment
In-depth knowledge of diesel engines, hydraulic systems, electrical systems, and electronic controls
Proficiency with diagnostic tools such as Cummins Insite, Detroit Diesel Diagnostic Link, or OEM software
Proficiency with hand and 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
Manufacturer-specific training or ASE Heavy Duty Truck certifications are a plus
Ability to lift heavy parts up to 50–75 lbs.
Ability to work in confined spaces such as under truck chassis
Ability to perform tasks in various weather conditions
Valid driver’s license required
CDL with appropriate endorsements strongly preferred

Benefits

Comp & perks

Competitive wages
Uniforms fully supplied by Interstate, including cleaning
Tool program available
Tuition assistance for educational and ongoing career growth
Health, dental and vision coverage beginning on the first day of the following month
Paid Time Off accruing from day one of full-time employment
6 holidays and 2 floating holidays per year
401(k) with company matching
Long-term disability supplied
Short-term disability supplied
Life insurance supplied
Healthiest You virtual health care paid by Interstate
PPE reimbursement for safety glasses and safety boots
Pet insurance
Employee discounts on products and services
Paid employee assistance program with free 24/7 access to a guidance consultant
Paid health and well-being screening for employees and spouse