Senior Mobile Diesel Tech — Field Lead & On-site Diagnostics

Cox Enterprises, Inc.; New York (NY); On-site; USD 70,000 - 95,000; Full time

Benefits offered by this job

Health, dental, vision insurance

401(k) matching

Paid Time Off

Tuition Assistance/Reimbursement

Adoption/Surrogacy assistance

Pet Insurance

Employee discounts

Job summary

Cox Fleet, a leading nationwide on-site mobile maintenance provider, seeks a Sr. Mobile Diesel Technician. You will perform DOT inspections, PMs, and advanced repairs on a range of trucks, including heavy-duty equipment, in a mobile/field setting.

You will lead on-site diagnostics, triage complex repairs, and interact with customers to ensure service quality. Role requires diesel tech expertise, tool readiness, and DOT compliance.

Qualifications

• HS diploma or GED with related field experience, or equivalent
• At least 3–5 years in related field with DOT/FMCSA requirements
• Experience with refrigerated equipment preferred
• Must possess and supply a set of hand tools
• DOT pre-employment background screening and physical requirements

Responsibilities

• Perform DOT inspections and preventative maintenance on mobile, light, medium, and heavy-duty vehicles
• Diagnose and repair electrical, brake, cooling, engine, and drivetrain systems
• Test and road-test vehicles to verify repairs and functionality
• Maintain service truck and tools, manage parts inventory and documentation in TRAIT app
• Complete DOT forms and repair orders accurately and timely

Skills

Attention to safety

Effective communication

Diagnosing & problem-solving

Prioritization & time management

Customer service

Team collaboration

Education

High School Diploma/GED

ASE certifications (PMI 608/609, T8)

Tools

Hand tools

Diesel tools

Inspection equipment

Job description

Cox Fleet, a leading nationwide on-site mobile maintenance provider, seeks a Sr. Mobile Diesel Technician. You will perform DOT inspections, PMs, and advanced repairs on a range of trucks, including heavy-duty equipment, in a mobile/field setting.

You will lead on-site diagnostics, triage complex repairs, and interact with customers to ensure service quality. Role requires diesel tech expertise, tool readiness, and DOT compliance.