Diesel Mechanic / Technician All Levels

Service Technician / Diesel Mechanic

We are seeking an experienced Service Technician / Diesel Mechanic with at least 5+ years of experience working on medium- and heavy-duty trucks. This role requires strong diagnostic skills, hands-on mechanical expertise, and the ability to efficiently identify and repair a wide range of equipment issues.

Technicians will work on truck chassis, diesel engines, hydraulics, electrical systems, and truck-mounted utility equipment.

Key Responsibilities

• Diagnose, repair, and replace worn or damaged components on vocational and utility trucks
• Perform preventative maintenance and detailed inspections
• Troubleshoot mechanical, hydraulic, and electrical systems
• Service truck-mounted equipment including boom trucks, bucket trucks, diggers, dump trucks, service trucks, forestry equipment, and aerial devices
• Use diagnostic software and scan tools to identify faults and performance issues
• Complete and maintain accurate service and repair records
• Submit work orders for approval and ensure repair costs are tracked accurately
• Follow all safety procedures and attend monthly safety meetings
• Perform additional duties as assigned

Core Competencies

• Strong diesel engine diagnostics and repair (mechanical & electrical)
• Preventative maintenance and visual inspections
• Proficient with diagnostic software and scan tools
• Ability to interpret fault codes, engine data, and system performance
• Working knowledge of diesel engines, drivetrain, hydraulics, and electrical systems

Technical Experience

• Cummins INSITE diagnostic software
• Detroit Diesel DiagnosticLink (DDDL)
• OEM and aftermarket diagnostic tools
• Electrical and hydraulic troubleshooting

Basic Qualifications

• High school diploma or equivalent
• Experience with diesel, medium/heavy-duty trucks, or related equipment (construction, agriculture, military)
• General mechanical aptitude (hydraulics, electrical, heavy equipment)
• Basic computer skills and ability to document repair activity
• Valid driver's license
• Must supply own tools

Preferred Qualifications

• Vocational/Technical training or Military Wheeled Mechanic experience
• 3+ years of utility truck or heavy equipment repair experience
• CDL Class A or B (preferred)

Work Schedule & Physical Requirements

• MondayFriday, day shift; overtime as needed (occasional Saturdays)
• Ability to lift and move tools/equipment
• Frequent bending, stooping, kneeling, and standing
• High level of manual dexterity required

Compensation & Benefits

• Competitive pay based on experience
• Health benefits including dental and vision
• 401(k) with company match
• Paid time off Vacation, Sick, Holidays
• Tool discount program
• STEP Technician Training Program and career advancement opportunities

Custom Truck One Source is an Equal Opportunity Employer and provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws.

Please note that we do not offer sponsorship for work authorization. Only candidates authorized to work in United States without the need for sponsorship will be considered for this position.