Lead Mobile Diesel Mechanic

Cox Enterprises; Edison (NJ); On-site; USD 65,000 - 95,000; Full time

Benefits offered by this job

Weekly pay

Bonuses

Uniforms provided

Service truck home

Tablet & company phone

Technical training

Career path

Job summary

Cox Fleet is seeking a Lead Mobile Diesel Technician to perform DOT inspections, PMs, and advanced repairs in a mobile/field setting. You will mentor other technicians, manage parts and vehicle readiness, and ensure safety and regulatory compliance on every job.

The role emphasizes strong customer interaction, on-site leadership, and the ability to work with limited supervision while maintaining productivity and meeting standard repair times.

Qualifications

• HS diploma or GED with 5–9 years in field, or equivalent combination.
• ASE certifications (T8 PMI, 608/609, C1) within 18 months.
• Valid DOT/FMCSA compliance and heavy-truck maintenance experience.

Responsibilities

• Perform scheduled PMs and DOT inspections on vehicles in mobile/field setting.
• Diagnose and repair electrical, hydraulic, braking and engine systems.
• Lead on job sites and mentor junior technicians.
• Manage partsInventory and equipment on service truck; document RO notes.
• Ensure safety checks, compliance with OSHA, EPA, DOT policies.

Skills

DOT inspections

PM inspections

Diagnostics

Customer interaction

Mentoring technicians

Inventory management

Safety compliance

Education

HS diploma/GED and 5–9 years of experience

Job description

*** Must have availability to cover weekend issues ***

Cox Fleet keeps your fleet moving!

Headquartered in Indianapolis, Cox Fleet has grown to become one of the largest fleet maintenance companies in the country.

Cox Fleet is the leading provider of on-site mobile maintenance and repair services nationwide, offering mobile on-site fleet service for light medium, and heavy‑duty trucks and trailers. Cox Fleet also services customers utilizing its 50+ nationwide service centers; each offering accident repair, painting, refurbishment, and heavy mechanical repair. We are supported by a 24/7 in‑house call‑center and provide scheduled maintenance services and unscheduled services to fleets anywhere, anytime.

Cox Fleet is currently hiring a Lead Mobile Diesel Technician. The Lead Mobile Diesel Technician will be responsible for performing licensed DOT inspections, Preventative Maintenance inspections, light and advanced repairs, advanced mechanical/hydraulic/electrical and electronic diagnostics, and other duties as assigned. Achieve a mastery in majority of technical disciplines. Moderately relied upon for advanced diagnostics and triage of complicated repairs. Heavily relied upon for customer interaction and communication. Lead on jobsites, and the customer’s interaction is heavily influenced by this type of mechanic. Mentor and teach other Technicians in the field in a manner most conducive to their learning style. The Lead Mobile Diesel Technician has multiple interactions with Mobile Technician Manager to make valuable decisions related to the performance and potential of other Technicians within the group. Performs duties of Mobile Technician Manager in their absence.

DUTIES:

• Perform scheduled preventative maintenance (“PM”), DOT Inspections and follow up repairs on light, medium and heavy‑duty vehicles in a mobile/field environment.
• Perform minor adjustment and repairs on various types of truck equipment including, but not limited to the following: Electrical/Brake/Cooling Systems, Starters/Alternators, Fan clutches, Engine electronics, Diesel steering systems, Engines (gas and diesel), Transmissions (manual and automatic), Clutches, Differentials, etc.
• Diagnose, adjust, and repair various types of truck equipment including, but not limited to the following: Electrical/Brake/Cooling Systems, Starters/Alternators, Air conditioning systems, Fan clutches, Engine electronics, Diesel steering systems, Engines (gas and diesel), Transmissions (manual and automatic), Clutches, Differentials, etc.
• Inspect, test, and listen to defective equipment to diagnose malfunctions, using test instruments such as handheld computers and pressure gauges.
• Road test vehicles to diagnose malfunctions and to ensure that they are working properly.
• Identify problems, determine accuracy and relevance of information, using sound judgment to generate and evaluate alternatives.
• Independently manage parts inventory and equipment provided on company‑issued service truck and perform periodic reconciliation.
• Maintain and operate company‑issued service vehicle, conduct safety checks, and pre-/post‑trip inspections of vehicle.
• Work with and listen effectively to clients and customers to assess their needs, providing information or assistance, resolving their problems, or satisfying their expectations.
• Manage concurrent assigned tasks, making effective judgments as to prioritizing work related activities and time allocations.
• Use hand tools, precision instruments, as well as Diesel tools, welding equipment, lift and jacks.
• Document according to company standards and upload pictures of work performed, parts used, and all findings observed on Repair Orders (“RO”) using company‑issued iOS device and our proprietary TRAIT application.
• Accurately complete DOT forms and all other forms of documentation in timely fashion.
• Work with a high degree of independence and manage own daily schedule.
• Maintain a high level of productivity and be able to work within or close to most Standard Repair Times.
• Obtain parts from approved local and national vendors as necessary for the repairs to be performed.
• Communicate with management and support team via email or phone to obtain approvals on repair estimates, retrieve purchase order numbers and/or discuss RO findings notes.
• Perform all work in compliance with organizational safety, health and environmental policies, and federal regulations, to include OSHA, EPA, and DOT.
• Maintain company issued service truck, conduct safety checks and daily pre/post trip inspections.
• Support Mobile Diesel Technicians I/II/Sr in inventory reconciliation.
• Mentor Mobile Diesel Technicians I/II/Sr on best practices and techniques to stay within or close to most Standard Repair Times.
• Assist Mobile Tech Manager (MTM) with Quality Control Inspections on work performed by Mobile Diesel Technicians I/II/Sr.

REQUIREMENTS:

• High School Diploma/GED and 7 years’ experience. The right candidate could also have a
• different combination, such as any level degree/certification beyond a HS diploma/GED in a related discipline and 5 years’ experience; or 9 years’ experience in a related field
• Possess and supply a set of hand tools necessary to perform required job duties.
• Obtain Automotive Service Excellence (ASE) certification T8 (PMI) within eighteen (18) months.
• Obtain Automotive Service Excellence (ASE) certification C1 (Service Consultant) within eighteen (18) months.
• Obtain 608/609 certification within eighteen (18) months.
• This position follows regulations issued by the Department of Transportation’s (DOT) Federal Motor Carrier Safety Administration (FMCSA). Candidate must be able to successfully complete and pass a DOT‑regulated pre‑employment background screening and DOT physical prior to employment.
• A current and valid DOT medical card with more than four (4) months remaining until its expiration may be submitted in leu of a DOT physical. If the DOT medical card has four (4) months or less of validity remaining, a DOT physical will be required.
• Due to interstate operating authority commerce regulations, candidates must be at least 21 years or older.
• Safe drivers needed; valid driver’s license required. Candidate must hold a valid state‑of‑residence driver’s license, be able to obtain and maintain their Driver Qualification File.

REQUIRED CERTIFICATIONS OR OBTAINED WITHIN 18 MONTHS

• ASE T8 (PMI) certification
• ASE 608/609 certification*
• ASE C1 (Service Consultant) certification

PREFERRED CERIFICATIONS

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

SKILLS & ABILITIES

• Understand the implications of new information for both current and future problem‑solving and decision‑making.
• Ability to lift, bend, climb, stand, and walk for long periods of time; ability to perform moderately heavy laboring work
• Ability to exert oneself physically over long periods of time without tiring, which may include performing repetitive tasks.
• Communicates information (for example, facts, ideas, or messages) in a succinct and organized manner. Engages in effective two‑way communication with individuals and groups.
• Ability to determine the type of tools and equipment needed.
• Ability to accurately judge which of several objects is closer or farther away from the observer, or the distance between an object and the observer.
• Use logic and reasoning to identify the strengths and weaknesses of alternative solutions, conclusions, or approaches to problems.

Why Cox Fleet?

• Weekly pay – get paid every Friday for added convenience and financial flexibility
• Safe driving & tech efficiency bonuses
• Safety boots & safety glasses reimbursement
• Extreme weather gear (cold & hot)
• Uniforms provided with laundry service where available
• Take the service truck home daily (stop paying for gas!)
• Tablet & company cellphone provided
• Technical training provided to advance your career
• Dedicated career path – Over 50% of our front‑line managers are promoted from within

Benefits:

• Health, dental, vision insurance starts DAY ONE of employment.
• 401(k) matching starts after 90 days, 100% match up to 6% contribution and an additional 2% discretionary contribution by the company.
• Accrue up to 200 hours (5‑weeks) of Paid Time Off based on your tenure with the company.
• Tuition Assistance/Reimbursement
• Adoption/Surrogacy assistance
• Pet Insurance
• Multiple ERG, diversity groups, and company paid volunteer hours.
• Employee discounts on new vehicle purchases, cellphone plans, ridesharing, home/rental insurance, wellness/fitness incentives and much more.