Sr Mobile Diesel Mechanic - Day Shift

Cox Automotive Inc.; Mesa (AZ); Hybrid; USD 44,441 - 66,689; Full time

Benefits offered by this job

Weekly pay

Safety boots reimbursement

Technical training program

Job summary

Cox Automotive Inc. is looking for a Sr. Mobile Diesel Technician in Mesa, Arizona. This role involves performing maintenance and repairs on various trucks in a mobile environment. You'll be expected to diagnose issues and manage parts inventory while operating independently to maintain high productivity standards.

The ideal candidate will have significant experience, certifications, and the ability to work under various conditions. Great benefits and compensation package available, including health insurance and bonuses.

Qualifications

• 5 years of related experience, with 7–10 years preferred.
• 3 years experience with refrigerated equipment.
• Must pass DOT background screening and physical.

Responsibilities

• Perform scheduled maintenance and DOT inspections.
• Diagnose and repair truck equipment.
• Maintain service truck and conduct safety checks.

Skills

Problem-solving

Physical stamina

Clear communication

Logic and reasoning

Education

High School Diploma or GED

Tools

Set of hand tools

Job description

Company Overview

Cox Fleet keeps your fleet moving! Headquartered in Indianapolis, Cox Fleet is one of the largest fleet maintenance companies in the country and the leading provider of on‑site mobile maintenance and repair services nationwide. We service light, medium, and heavy‑duty trucks and trailers, and we offer accident repair, painting, refurbishment, and heavy mechanical repair through 50+ national service centers. We are supported by a 24/7 in‑house call center and provide scheduled and unscheduled maintenance services anywhere, anytime.

Position

Sr. Mobile Diesel Technician

Duties

• Perform scheduled preventive maintenance ("PM"), DOT inspections, and follow‑up repairs on light, medium, and heavy‑duty vehicles in a mobile/field environment.
• Perform minor and major repairs on truck equipment (electrical, brake, cooling, starter/alternator, fan clutch, engine electronics, diesel steering, engines, transmissions, clutch, differential, etc.).
• Diagnose, adjust, and repair various truck systems and components.
• Inspect, test, and listen to defective equipment, using test instruments such as handheld computers and pressure gauges.
• Road test vehicles to confirm proper operation.
• Identify problems, evaluate alternatives, and make independent judgments.
• Manage parts inventory and perform periodic reconciliation.
• Maintain and operate company‑issued service vehicle, including safety checks and pre/post‑trip inspections.
• Listen to customer needs and provide solutions.
• Prioritize concurrent tasks and manage time effectively.
• Use hand tools, precision instruments, diesel tools, welding equipment, lifts, and jacks.
• Document work using company iOS devices and the proprietary TRAIT application.
• Complete DOT and other required forms accurately and timely.
• Operate independently and manage daily schedule.
• Maintain high productivity within standard repair times.
• Obtain parts from approved vendors.
• Communicate with management and support teams via email or phone for approval and updates.
• Comply with safety, health, environmental, OSHA, EPA, and DOT regulations.
• Maintain the service truck and conduct safety checks and daily inspections.

Requirements

• High School Diploma or GED and 5 years of related experience (or a higher degree/ certification plus fewer years as specified). Minimum 7–10 years preferred.
• At least 3 years of experience with refrigerated equipment.
• Set of hand tools required.
• OEM training and certifications preferred.
• Must complete all in‑company required training.
• Must pass DOT‑regulated background screening and DOT physical (or hold a valid DOT medical card with >4 months remaining).
• Must be at least 21 years old.
• Valid driver’s license and ability to maintain Driver Qualification File.

Required Certifications

• ASE T8 (PMI)
• ASE 608/609

Preferred Certifications

• ASE T2 (Diesel Engines)
• ASE T3 (Drivetrain)
• ASE T4 (Brakes)
• ASE T5 (Suspension)
• ASE T6 (Electrical & Electronics)
• ASE T7 (HVAC)
• ASE A8 (Engine Performance)
• ASE L1 (Advanced Engine Performance Specialist)
• ASE L2 (Electronic Diesel Engine Diagnosis Specialist)

Skills & Abilities

• Apply new information to current and future problem‑solving.
• Physical stamina to lift, bend, climb, stand, walk long periods, and perform moderate heavy labor.
• Communicate clearly and engage in two‑way communication.
• Determine appropriate tools and equipment.
• Accurately judge distances and spatial relationships.
• Use logic and reasoning to evaluate alternative solutions.

Why Cox Fleet?

• Weekly pay every Friday.
• Safe driving & tech efficiency bonuses.
• Safety boots, glasses reimbursement.
• Extreme weather gear.
• Uniforms provided with laundry service where available.
• Take service truck home daily.
• Tablet & company cellphone provided.
• Technical training to advance career.
• Dedicated career path – over 50% of front‑line managers promoted from within.

Benefits

• Health, dental, vision insurance starts day one.
• 401(k) match 100% up to 6% plus 2% discretionary contribution.
• Paid time off: accrue up to 200 hours (5 weeks) based on tenure.
• Tuition assistance/refund.
• Adoption/surrogacy assistance.
• Pet insurance.
• Multiple ERG, diversity groups, company paid volunteer hours.
• Employee discounts on vehicles, cell phones, ridesharing, insurance, wellness, and more.

Compensation

Hourly pay range: $32.26–$48.41 per hour. Base rate may vary by location and candidate qualifications. Additional commission or incentive programs may apply.

Additional Information

Applicants must currently be authorized to work in the United States without sponsorship. EOE, including disability/veteran.