Mobile Diesel & Trailer Mechanic II Tuesday through Saturday

CAI Cox Automotive Corp Svcs., LLC; Arizona; Hybrid; USD 60,000 - 90,000; Full time

Benefits offered by this job

Health, dental, and vision insurance (

401(k) matching

Paid Time Off

Tuition assistance

Pet insurance

Employee discounts

Safety gear provided

Career development

Job summary

CAI Cox Automotive Corp Svcs., LLC is seeking a Mobile Diesel & Trailer Technician to perform DOT inspections, PMs, and follow‑up repairs on light to heavy‑duty vehicles in a field setting. You will diagnose, adjust, and repair truck and trailer systems using tests and handheld devices, conduct road tests, and manage parts inventory.

Safety and quality are emphasized in daily independent work. Requirements include a HS diploma or GED with 3+ years of related experience, ownership of hand tools,

Qualifications

• High School Diploma or GED with ≥3 years related experience
• Own a set of hand tools
• ASE T8 certification within 18 months of hire
• DOT pre-employment background check and DOT physical; a valid DOT medical card may substitute
• Must be 21+ with 3-year MVR review
• Valid driver's license and ability to maintain a Driver Qualification File
• Strong safety, communication, and independence skills
• Preferred ASE T3/T4/T5/T6/T7/T608/609 certifications

Responsibilities

• Perform PM, DOT inspections, and follow-up repairs on light, medium, and heavy‑duty vehicles
• Adjust and repair truck equipment including electrical, brakes, cooling, engine electronics
• Adjust and repair trailer equipment such as brakes, air lines, liftgates, and brake chambers
• Diagnose and repair vehicle systems using test instruments and handheld devices
• Conduct road tests to verify operation and troubleshoot issues
• Manage parts inventory and obtain approvals for estimates
• Complete DOT forms accurately and timely
• Adhere to safety, health, and environmental regulations

Skills

Strong communication

Independent work

Physical stamina

Critical thinking

Education

High School Diploma or GED

ASE T8 Certification

Tools

TRAIT application

Handheld devices

Pressure gauges

Job description

Mobile Diesel & Trailer Technician

We are looking for a Mobile Diesel & Trailer Technician who will perform DOT inspections, preventative maintenance, light, and follow‑up repairs on light, medium and heavy‑duty vehicles in a mobile/field environment. The position requires independent work, strong mechanical knowledge, and a focus on safety and quality service.

Responsibilities

• Perform scheduled preventative maintenance (“PM”), DOT inspections, and follow‑up repairs on light, medium, and heavy‑duty vehicles.
• Adjust and repair truck equipment such as electrical, brake, cooling, starter/alternator, fan clutch, engine electronics, diesel steering, engines, transmissions, clutches, and differentials.
• Adjust and repair trailer equipment including aluminum and chem‑lite, brakes, air lines, auxiliary pumps, liftgates, and brake chambers.
• Diagnose, adjust, and repair a wide range of truck and trailer systems using test instruments, handheld computers, and pressure gauges.
• Conduct road tests to verify proper operation and troubleshoot malfunctions.
• Identify problems, evaluate alternatives, and independently manage parts inventory on the company‑issued service truck.
• Maintain, inspect, and perform pre‑ and post‑trip checks on the service vehicle.
• Use hand tools, precision instruments, diesel tools, welding equipment, lifts, and jacks to complete repairs.
• Document all work on the TRAIT application, including pictures, parts used, and findings.
• Accurately complete DOT and other required forms in a timely manner.
• Work independently, manage daily schedule, and meet standard repair time targets.
• Obtain parts from approved vendors and communicate with management to approve estimates and report findings.
• Adhere to all safety, health, environmental, OSHA, EPA, and DOT regulations.

Requirements

• High School Diploma or GED with at least 3 years of related experience (alternative combinations of education and experience are acceptable).
• Ownership of a set of hand tools needed for the role.
• Obtain ASE certification T8 (PMI) within 18 months of hire.
• Pass DOT pre‑employment background screening and a DOT physical; a DOT medical card with more than 4 months of validity may substitute for the physical.
• Minimum age 21 years; 3‑year Motor Vehicle Records review required.
• Valid state of residence driver’s license and ability to maintain a Driver Qualification File.
• Strong safety, communication, and independence skills.
• Preferred certifications: ASE T3 (Drivetrain), T4 (Brakes), T5 (Suspension), T6 (Electrical & Electronic Systems), T7 (HVAC), T608/609.

Skills & Abilities

• Physical ability to lift, bend, climb, stand, and walk for extended periods; perform moderate heavy labor and repetitive tasks.
• Strong communication skills, both written and verbal, with the ability to explain technical issues clearly.
• Critical thinking and decision‑making to identify problems and evaluate solutions.
• Ability to work independently, prioritize tasks, and meet productivity goals.

Benefits

• Health, dental, and vision insurance effective DayOne.
• 401(k) matching after 90 days (up to 6% company match plus 2% discretionary).
• Paid Time Off: up to 200 hours (5weeks) based on tenure, with additional PTO, bereavement, jury duty, volunteer time, military, and parental leave.
• Tuition assistance/reimbursement.
• Adoption and surrogacy assistance.
• Pet insurance.
• Employee discounts on vehicles, cellphone plans, ridesharing, insurance, fitness, and more.
• Safety gear: boots, glasses, cold/hot weather gear, uniforms with laundry service, company laptop & cellphone, and the option to take the service truck home daily.
• Training and career advancement opportunities with a dedicated career path.

Equal Employment Opportunity Statement

Cox is an Equal Employment Opportunity employer. All qualified applicants and employees will receive consideration for employment without regard to age, race, color, religion or creed, national origin or ancestry, sex (including pregnancy), sexual orientation, gender identity, physical or mental disability, veteran status, genetic information, ethnicity, citizenship, or any other characteristic protected by law. Cox provides reasonable accommodations when requested by a qualified applicant or employee with a disability, unless such accommodations would cause undue hardship.

Applicants must be authorized to work in the United States without current or future sponsorship. No OPT, CPT, STEM/OPT, or visa sponsorship will be provided now or in the future.