Senior Onsite Mobile Diesel Technician

Cox Automotive Inc.; Mesa (AZ); On-site; USD 3,600 - 111,000; Full time

Benefits offered by this job

Weekly pay

Safety boots reimbursement

Safety gear provided

Uniforms provided

Company truck home

Technical training

Career path and promotion from within

Health, dental, vision starts day one

Job summary

Cox Fleet is seeking a Lead Mobile Diesel Technician to perform DOT inspections, PMs, and advanced diagnostics on light, medium, and heavy‑duty trucks in a mobile environment. You will mentor other technicians and coordinate on‑site repairs with customers, while upholding safety standards and company procedures.

You’ll manage parts, use Diesel tools, test equipment, and document work in TRAIT on company iOS devices, with a focus on meeting repair times and delivering reliable fleet service

Qualifications

• High School Diploma or GED with 7 years experience, or related degree/certification with 5 years experience, or 9 years in related field.
• Must meet DOT/FMCSA requirements and pass pre-employment screening.
• DOT medical card must be valid or be able to obtain.
• Must be at least 21 years old due to interstate operating rules.

Responsibilities

• Perform PMs, DOT inspections, and repairs on light, medium and heavy‑duty vehicles in mobile/field environment.
• Diagnose and repair electrical, hydraulic, and electronic systems on trucks.
• Lead on jobsites and mentor other technicians and collaborate with Mobile Technician Manager.
• Document work and upload photos in TRAIT on company iOS devices.
• Manage parts inventory and service truck equipment; perform periodic reconciliations.
• Ensure safety, health and environmental policies and DOT compliance in all tasks.

Skills

DOT inspections

Diagnostics

Electrical systems

Hydraulic systems

Customer interaction

Education

High School Diploma/GED

Related degree/certification with experience

Tools

ASE certifications: T8 PMI

ASE 608/609

ASE C1 (Service Consultant)

Job description

Cox Fleet is seeking a Lead Mobile Diesel Technician to perform DOT inspections, PMs, and advanced diagnostics on light, medium, and heavy‑duty trucks in a mobile environment. You will mentor other technicians and coordinate on‑site repairs with customers, while upholding safety standards and company procedures.

You’ll manage parts, use Diesel tools, test equipment, and document work in TRAIT on company iOS devices, with a focus on meeting repair times and delivering reliable fleet service