Mobile Master Diesel Mechanic;

Job Title: Mobile Master Diesel Technician

Department: Maintenance Diversification / Business Development

Reports To: Mobile Service Manager / VP of Maintenance Diversification

Position Type: Full-Time,Non-Exempt

Location: Field-Based /National

Travel: Extensive national travel, including overnight deployments up to 100% during active assignments

At RATP Dev, we operate and maintainurban and regional transportation systems in virtually every corner of theglobe. As a leader in public transit, we are dedicated to providing safe,reliable, and innovative mobility solutions. Our team of maintenance professionals is the backbone of our operation, ensuring that our fleet remainsat peak performance to serve our communities every day.

We are seeking an elite,safety-focused Mobile Master Diesel Technician to join our maintenancedivision. This national field role provides advanced diagnostics, complexrepairs, major-component replacement, rehabilitation support, and technical leadership across transit fleet assignments.

Critical components:

The Mobile Master Diesel Technician provides high-level technical expertise, advanced diagnostics, major mechanical repair, and project support across RATP Dev USAtransit fleets and other approved customer assignments. The technician works independently, supports startups and recoveries, mentors local staff, and helpsexecute defined overhaul and midlife-rehabilitation scopes.

Advanced Diagnostics & Repair: Diagnose and repair complex faultsinvolving diesel and gasoline engines, transmissions, steering, suspension, air systems, heavy-duty braking, electrical/electronic controls, multiplex systems,HVAC interfaces, and emissions/aftertreatment.

Major Component & Overhaul Work: Perform or lead approvedmajor-component replacement and rehabilitation work, including engine and transmission removal/installation, aftertreatment, cooling systems,axles/differentials, suspension, steering, brake systems, and related midlifeoverhaul tasks within the approved scope.

Inspections& Verification: Conduct comprehensive PM, condition, andsafety inspections; document root cause, repair steps, test results, parts,labor, and post-repair verification.

Operational Support & Startups: Deploy rapidly for new contractstartups, fleet transitions, temporary staffing shortages, repair campaigns,and vehicle recovery projects.

OEMDiagnostics: Use OEM diagnostic software, laptopcomputers, service information, schematics, pressure/measurement equipment, andother specialized tools to diagnose and verify repairs.

Mentoring& Quality Assurance: Serve as a technical mentor to localtechnicians, identify recurring failures, assist with training gaps, and reviewcompleted work for quality and procedural compliance.

Safety& Vehicle Release: Road test and release vehicles onlywhen authorized and after required safety checks, repair verification, andlocal release procedures are complete.

Work Order Documentation: Maintain precise electronic records ofdefects, cause, correction, parts, labor, photographs, test results, and finalvehicle disposition.

Education: High School Diplomaor equivalent required. Technical school training in Medium/Heavy-Duty Diesel Technology or equivalent military training is highly preferred.

Experience: Minimum of seven (7) years of progressive heavy-duty fleet maintenance experience, with substantialtransit-bus, motor-coach, or comparable commercial vehicle experience.

Licenses/Certifications:Class A or Class BCDL with Air Brake and Passenger endorsements is required for assignments that include covered-bus road testing and should be maintained as a corequalification for this role. ASE Master Transit Bus, ASE Master Medium/Heavy Truck, or equivalent OEM master-level credentials are strongly preferred and maybe required under the approved hiring standard.

Testing /Safety-Sensitive Assignments: Must satisfy applicable company, site,DOT/FMCSA, and FTA drug-and-alcohol testing requirements when assigned tocovered safety-sensitive duties.

Diagnostics:Expert mechanical and electrical troubleshooting using schematics, OEM service information, diagnostic software,and test equipment.

Heavy Repair: Strong capability inengine/transmission R&R, aftertreatment, brakes, steering, suspension,pneumatics, cooling, and related heavy-duty systems.

Field Leadership: Abilityto work independently, mentor technicians, communicate repair decisions, andmanage assigned…