← Back to jobs

Sr. Mobile Diesel Mechanic

Location
Manhattan, NY
Work type
Full Time
Posted
2026-09-03

Job description

The Sr. 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. Heavily relied upon for advanced diagnostics and triage of complicated repairs by Mobile Diesel Technician I/II. Considered the Lead on jobsites by customers and Technicians. Functions as a consultant on the customer's behalf. A successful Sr Mobile Diesel Technician complies with all company policies and achieves high level performance metrics.

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.

REQUIREMENTS:

· High School Diploma/GED and 3 years’ experience in a related field. The right candidate could also have a different combination, such as any level degree/certification beyond a HS diploma/GED in a related discipline; or 5 years’ experience in a related field.

· At least 3 years of experience with refrigerated equipment

· Possess and supply a set of hand tools necessary to perform required job duties.

· OEM training and certifications are preferred.

· Participate in and complete all-in company required training

· Possess and supply a set of hand tools necessary to perform required job duties.

· 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*

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)

· 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 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.

Original source