Mobile Diesel Fleet Technician — On‑Site Truck & Equipment Care

Coulter Services; West Haven (CT); On-site; USD 34,000 - 55,000; Full time

Job summary

Coulter Services in West Haven, CT is seeking a Mobile Automotive Technician to perform on-site diagnosis, repair, and preventive maintenance for trucks, trailers, and fleet equipment using a fully equipped mobile service unit.

You will respond to emergency roadside calls, troubleshoot engines, brakes, electrical, and hydraulic systems, document all work, and uphold safety and customer service in a field-based, independent role.

Qualifications

• Hands-on experience with diesel and fleet maintenance and troubleshooting.
• Strong diagnostic skills across mechanical, electrical, and hydraulic systems.
• Commitment to safety, quality workmanship, and customer service.
• Ability to work independently in the field and provide professional communication.
• Willingness to learn and grow within a customer-first team.

Responsibilities

• Perform on-site diagnosis, repair, and preventive maintenance for trucks, trailers, and fleet equipment.
• Respond to emergency roadside calls using a fully equipped mobile service unit.
• Troubleshoot and repair engines, brakes, electrical, and hydraulic systems.
• Inspect vehicles and components to ensure safe, reliable operation.
• Document all work performed and maintain accurate service records.

Skills

Diesel fleet maintenance

Diagnostics (mechanical, electrical, &

Safety & quality workmanship

Independent field work

Professional communication

Job description

Coulter Services in West Haven, CT is seeking a Mobile Automotive Technician to perform on-site diagnosis, repair, and preventive maintenance for trucks, trailers, and fleet equipment using a fully equipped mobile service unit.

You will respond to emergency roadside calls, troubleshoot engines, brakes, electrical, and hydraulic systems, document all work, and uphold safety and customer service in a field-based, independent role.