Mobile Diesel Mechanic

ABC Companies•Grand Prairie, TX

7d•Onsite

About The Position

The Mobile Diesel Technician is an advanced-level field service technician responsible for diagnosing, repairing, and maintaining motorcoaches and other commercial vehicles at customer locations and remote job sites. The technician works from a company-provided mobile service vehicle and independently performs complex mechanical, diesel, electrical, HVAC, and electronic diagnostics and repairs while providing responsive, professional customer service. The role takes ownership of service calls from initial diagnosis through repair, verification, documentation, and customer communication. It requires regular travel, including overnight travel, independent work, and compliance with company standards for safety, quality, documentation, and customer service. The technician also serves as a technical resource to customers and internal teams and develops expertise across diesel, electrical, HVAC, electronic, EV/high-voltage, and emerging commercial vehicle technologies.

Requirements

10+ years of diesel, motorcoach, or heavy commercial vehicle diagnostic and repair experience preferred.
Advanced experience with heavy-duty diesel equipment, such as motorcoaches, transit buses, tractor-trailers, or heavy equipment.
Ability to independently troubleshoot and diagnose mechanical, electrical, HVAC, and electronic vehicle systems.
Experience with root cause analysis and resolving complex or recurring vehicle concerns.
Ability to read and interpret electrical schematics, wiring diagrams, service manuals, technical documentation, and diagnostic information.
EPA refrigerant certification, or ability to obtain it within 30 days of hire.
Proficiency with diagnostic software, service writing and work order tracking systems, computers, and other shop technology.
Personal tools necessary to perform assigned responsibilities.
Valid driver's license and a driving record that meets company requirements.
Ability and willingness to travel regularly, including overnight travel, and work independently at customer locations and remote job sites.
Ability to move items weighing at least 100 pounds.
Ability to stand, walk, bend, kneel, crouch, reach, climb, and move continuously for extended periods, stated as 80–100% of the shift.
Ability to safely enter, exit, and work inside, underneath, and around motorcoaches and other commercial vehicles.
Ability to operate hand tools, power tools, diagnostic equipment, and mobile service equipment.
Ability to perform repairs in remote locations where shop equipment or environmental controls may be limited, and to work indoors and outdoors in varying conditions.
Ability to drive for extended periods and travel overnight as required.

Nice To Haves

High-voltage and electric vehicle experience is highly valued; candidates with significant EV/high-voltage diagnostic and repair experience may be considered with less motorcoach-specific experience.
Previous mobile, field service, senior technician, or lead technician experience.
Experience with body and frame repairs and interior component repair or replacement.
Audio/video system knowledge.
CDL Class B with Passenger Endorsement.
ASE, Cummins, Detroit, Allison, HVAC, EV/high-voltage, or other relevant technical certifications.

Responsibilities

Travel to customer locations and field sites to diagnose, repair, and maintain motorcoaches and commercial vehicles.
Operate and maintain a company-provided mobile service vehicle for on-site technical support and repairs.
Communicate professionally with customers about vehicle concerns, repair status, recommendations, and follow-up needs.
Respond to service needs throughout the assigned area, including overnight travel as required.
Coordinate with Service leadership, Parts, and internal technical resources to resolve customer concerns.
Inspect, diagnose, repair, and maintain vehicles and equipment using advanced troubleshooting across diesel, mechanical, electrical, HVAC, and electronic systems.
Use diagnostic equipment, software, schematics, technical documentation, and established procedures to troubleshoot complex or intermittent concerns and identify root causes.
Complete repairs safely and efficiently to manufacturer and company quality standards, then verify proper operation before returning equipment to service.
Identify required parts and materials and coordinate their availability with Parts personnel.
Maintain an organized, clean, safe, service-ready mobile vehicle and appropriate inventory of parts, tools, supplies, and equipment.
Safeguard assigned company assets and communicate equipment, maintenance, and replenishment needs.
Document diagnostic findings, repairs, parts, labor, customer visits, and field service activities accurately using company systems.
Maintain accurate time and attendance records and communicate repair findings and unresolved concerns to customers and internal stakeholders.
Provide advanced diagnostic support to Service personnel and internal teams, collaborate on difficult vehicle concerns, and share technical knowledge and field observations.
Continue developing technical knowledge of commercial vehicle systems, diagnostic technologies, and repair methods.
Follow company safety policies and repair practices; assess field work environments and prioritize personal, customer, and vehicle safety.
Maintain compliance with applicable EPA, OSHA, DOT, and other requirements, and maintain required licenses and certifications.
Work overtime or weekends as required and perform additional duties and special projects as assigned.