Heavy-Duty Diesel Maintenance Technician III

Job Description

Job Description Heavy-Duty Diesel Maintenance Technician III

Department: Maintenance

Reports to: Manager – Murray Maintenance

FLSA Status: Hourly

A day in this role

You arrive at the bay, gear up, and dive into a full schedule: preventive inspections guided by FMCSA standards, unscheduled repairs on tractors and trailers, and the occasional minor body repair to keep our fleet road-ready. You work with limited supervision, document every detail with accuracy, and make sure parts are allocated to the correct unit. Your workspace stays clean and safe, and you may coach Level 1 techs on best practices. Every task follows established procedures so our drivers can roll safely and on time.

What you’ll tackle

• Perform routine preventive maintenance and vehicle inspections aligned with FMCSA inspection guidelines.
• Handle a variety of non-scheduled repairs on trucks and trailers with limited supervision.
• Record all work on work orders and inspection forms; enter accurate data and allocate parts to specific equipment.
• Keep assigned work areas clean and well maintained.
• Take on other related duties as assigned by management.

Who succeeds here

To perform this job successfully, an individual must be abel to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

• High school diploma or GED; vocational training preferred; preparation for CDL is a plus.
• 2–4 years of hands-on tractor/trailer maintenance experience in a commercial garage or fleet leasing company (minimum 2 years).
• Degree in Diesel Mechanics preferred.
• Core skills: computer literacy, clear communication, strong organization, and advanced problem-solving.
• Ability to perform under pressure and juggle multiple priorities effectively.

Supervisory Responsibilities: This job has no supervisory responsibilities.

Physical demands

**The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

• Regularly stand, walk, use hands and fingers, reach with hands and arms, stoop, kneel, crouch, crawl, and talk or hear.
• Frequently sit and climb or balance.
• Occasionally detect odors/smells.
• Regularly lift and/or move up to 100 pounds and frequently lift and/or move more than 100 pounds.
• Specific vision abilities include close, distance, color, peripheral vision, and depth perception.

Work environment

**The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

• Regular exposure to wet/humid conditions, moving mechanical parts, and high, precarious places.
• Frequent exposure to fumes or airborne particles, outside weather, extreme cold and heat, and vibration.
• Occasional exposure to toxic or caustic chemicals.
• Noise levels can be very loud.

Abilities that make a difference

The power to perform an observable activity at the present time. This means that abilities have been evident through activities or behaviors that are similar to those required on the job, e.g., ability to plan and organize work. Abilities are different from aptitudes. Aptitudes are only the potential for performing the activity.

• Planning: Plan, organize and prioritize work.
• Data and Research: Gather facts and communicate findings.
• Interpersonal Communication: Written and verbal expression and clarity.
• Problem Sensitivity: Anticipate or recognize problems early.
• Multi-tasking: Shift smoothly between multiple activities and information sources.
• Relator: Build lasting relationships across varied personality types.

Performance dimensions

• Service and Sensitivity: Show consideration for others; be responsive to drivers and internal/external customers.
• Listening: Actively focus to extract information in oral communication.
• Oral and Written Communication: Communicate effectively in groups or one-on-one; write with clarity, correct grammar, and concision.
• Planning and Organization: Set a clear course of action; prioritize responsibilities to complete daily work and projects on time.
• Judgment: Make rational, realistic decisions based on facts and aligned with the company’s mission and resources.
• Stress Tolerance: Maintain performance under pressure or opposition.
• Team Player: Align actions to corporate goals; collaborate, listen, respect others, and share ideas/information.

Technical proficiency

• Creating Preventive Maintenance Plans
• Electrical Troubleshooting
• Diesel & Heavy Equipment Systems
• Electrical Systems & Diagnostics (Heavy Equipment)
• Equipment Diagnostics & Troubleshooting
• DOT & Equipment Inspection Compliance
• Equipment Installation & Wiring
• Equipment Repair & Maintenance
• Equipment Installation