Diesel Technician

We are seeking a Diesel Technician to support a small technician team servicing fleet vehicles, heavy construction equipment, agricultural machinery, and other mixed equipment. This shop-based and field-focused role includes customer-site service and roadside assistance, with a day-shift schedule and on-call coverage.

Responsibilities

• Perform engine diagnostics and overhauls across mixed diesel equipment.
• Conduct preventive maintenance and inspections on fleet, construction, and agricultural equipment.
• Repair and maintain brake, electrical, and hydraulic systems.
• Replace defective parts and complete engine repairs.
• Prepare inspection reports and maintain accurate service documentation.
• Follow safety compliance procedures during shop, customer-site, and roadside repairs.
• Provide day-shift service and participate in on-call coverage.

Required Qualifications

• Proficiency in diesel engine diagnostics and engine repair.
• Experience with preventive maintenance and hydraulic systems.
• Electrical troubleshooting skills.
• Ability to use diagnostic software.
• Strong problem-solving and attention-to-detail skills.
• Commitment to safety compliance.

Preferred Qualifications

• Five or more years of experience in diesel equipment maintenance.
• High school diploma or GED.
• Commercial Driver’s License (CDL).

Thanks for checking us out. Here at Harmon Truck Service we service the needs of the market for Heavy truck, Trailer, Bus and Coach parts and repair service in Sullivan, MO. We have been serving the Sullivan and surrounding area since 1978. Today we specialize in trucks and equipment, 1 ton trucks and larger. We are a service dealer for Thomas Built Bus and Freightliner Custom Chassis. Come check us out for more information