Diesel Mechanic Job Description: Top Duties and Qualifications

A Diesel Mechanic, or Diesel Service Technician, inspects, diagnoses and repairs diesel-powered vehicles and machines, like trucks, forklifts and trailers. Their main duties include running diagnostic tests on vehicles, replacing the vehicles’ engine, transmission, steering mechanism or braking system and test driving the vehicle to determine if they properly fixed the maintenance issue.

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Diesel Mechanic duties and responsibilities

Diesel Mechanics collaborate with other repair team members to ensure a vehicle is safely and efficiently operating to the driver’s needs. They often have the following duties and responsibilities: 

  • Consulting the customer and reading work orders to evaluate the tasks required
  • Preparing work plans after fully scoping out the issues
  • Running diagnostic tests on diesel engines and interpreting the results to offer suitable solutions
  • Inspecting vehicle systems, including suspensions, steering and exhausts
  • Repairing or replacing vehicle transmissions, brakes, engines and other associated parts
  • Conducting field visits in the case of an emergency or sudden breakdown
  • Test driving repaired vehicles to gauge their performance
  • Completing oil changes, wheel balancing, alignment and brake checks
  • Maintaining records of parts inventory and serviced vehicles

Diesel Mechanic Job Description Examples:


Diesel Mechanic

[website] Xpress Tech Incentives:


  • Sign-On Bonus

  • Full Ride Program - [website] Xpress will partner with Ashford University to fully fund tuition for you and your children

  • Various Sponsored Certifications (ASE, 608, OEM) - Earn up to an extra $3600 per year

  • Annual Boot Allowance

  • Medical Benefits

  • Other Benefits Offered: Dental, Vision, 401k and more!


    South Carolina, Florida, Chicago, Atlanta, Texas and Ohio.

    Relocation Packages Available

    Summary - Tractor Technician / Mechanic

    Tests, services, and repairs tractors and related mechanical components.

    Duties& Responsibilities

  • Diagnose and repair most transmission,engine, electrical, suspension, driveline, Hvac, brakes and air systems. May require assistance from Tech III.

  • Repair/Replace bolt on body parts such as hoods and cab extenders.

  • Perform DOT inspections as outlined in USX guidelines.

  • Perform open seat inspections to prepare tractor for next driver.

  • Perform 90 day lease operator inspections.

  • Accurately complete DOT forms and all other forms of documentation in timely fashion.

  • Capable of using all diagnostic equipment and resources.

  • Drive trucks in and out of shop before and after repairs.

  • Clean and maintain work area on a daily basis.

  • Maintain a high level of productivity and be able to work within or close to most SRT times.

  • Perform basic or minor repairs and inspections on brakes, tires, wiring etc.

  • Perform basic and routine preventative maintenance on tractors and trailers

  • Check vehicle fluids; transmission, oil,windshield wiper, antifreeze, etc.

  • Perform vehicle preventative maintenance(pm’s) as outlined in USX pm guidelines.

  • Change vehicle tires.

  • Grease mechanical parts

  • Perform other duties as assigned.



  • High school diploma or equivalent required.


  • Monday-Friday 1:30pm-10pm


  • 2 years of tractor experience preferred.

  • A Technical Diploma from an accredited Diesel Technology Program may substitute for 1 year of the required experience.


  • Valid Driver’s License required.

  • Basic computer skills preferred.

  • Ability to read and write.

  • Must provide own hand tools that are adequate to perform job functions.

    Physical Requirements:

  • while performing the duties of this job the employee is regularly required to talk or hear; frequently stands, walks, uses hands to finger, handle or feel; and reaches with hands and arms.

    Job Type: Full-time

    Job Type: Full-time


  • Diesel Engnie/Technician: 2 years (Preferred)

  • Diagnostic Equipment: 2 years (Preferred)


  • Driver's License (Required)

    Application Question:

  • Which Location(s) are you interested in relocating to?


  • Health insurance

  • Dental insurance

  • Vision insurance

  • Retirement plan

  • Signing bonus

  • Paid time off

    Pay Frequency:

  • Bi weekly or Twice monthly

    Vehicle Heavy Heavy trucks

  • ×

    Diesel Mechanic

    Central Transport

  • is an industry leading Less-Than-Truckload (LTL) transportation carrier. We are one of the nation’s largest LTL carriers and have experienced significant growth over the last several years. As we continue to expand our network, we are seeking quality mechanics to help maintain our fleet of over 2,200 tractors, 8,500 trailers, and 1,700 forklifts across the United States and Canada.

    Position Available:

    Diesel Mechanic – Performing preventative maintenance as well as troubleshooting and repairing electrical and after-treatment systems on our Class 8 tractors.

  • Diesel Mechanics start at $24.50/HR - Earn $26.50/HR after one year of service

    What Central Offers:

  • Industry Leading Pay

  • Medical, Dental, PTO, Paid Holidays Off, Paid Bereavement Leave, Paid Jury Duty Leave

  • Now Offering Blue Cross Blue Shield Blue Care Network!

  • Free Uniforms Provided

  • Referral Bonus Program

  • Overtime pay after 40 hours

  • 2nd and 3rd shift premium

    Responsibilities Include:

  • Perform all levels of preventive maintenance services

  • Repair trucks, and trailers and related equipment in a timely and efficient manner

  • Inspect brake systems, steering mechanisms, wheel bearings and other important parts to ensure that they are in proper working condition

  • Perform routine maintenance such as changing oil, checking batteries and lubricating equipment and machinery

  • Repairing and troubleshooting of major components such as engine, transmission, and differentials

  • Responsible for repairing damage to containers, trailers, and chassis.

  • Repairing tears on the sides of containers

  • Replacing lights

  • Tire repair

  • Landing gear repair

  • Frame repair

  • Preventative maintenance / running repair / brakes / suspension

    Job Requirements:

  • 1 year of experience

  • Basic set of tools

  • ASE certification preferred but not required

    If you’re interested and would like to learn more, please call [phone number] ext. 2671 or submit your resume!

    Job Type: Full-time

    Salary: $24.50 to $28.50 /hour


  • Diesel Mechanic: 1 year (Preferred)

    Work Location:

  • One location


  • Health insurance

  • Dental insurance

  • Vision insurance

  • Signing bonus

  • Paid time off


  • Diesel engines

    Vehicle Type:

  • Heavy trucks

    Shop Type:

  • Only full-time employees eligible
  • ×

    Diesel Mechanic

    If you are an experienced Diesel Technician / Heavy Truck Mechanic seeking a career and a company you can grow with, we want to talk to you! This opportunity is immediate, so Apply Today!

    Industrial Transport Services is now hiring skilled Diesel Technicians / Heavy Truck Mechanics in Houston, Texas.

    We offer a Comprehensive Benefits Package:

  • Competitive Pay: Earn up to $20/hr. starting

  • Opportunities available for additional compensation!

  • Performance bonus plan

  • Health/Dental/Vision Insurance

  • 401(K) with profit sharing

  • Tool Certification Program

  • Paid Training

  • Paid assistance to obtain CDL (training and license!)

  • Stable employment at a growing company that offers advancement opportunities!


  • Diesel Technician / Heavy Truck Mechanics will perform quality repairs and maintenance on all Heavy Truck and Diesel Engines as specified in manufacturer designed procedures or accepted industry practices.

  • Diesel Technicians / Heavy Truck Mechanics will accurately complete all paperwork including repair information on work orders, information for state inspections, etc.

  • Dedication and adherence to all company and industry safety standards

    Job Requirements

  • High school diploma/GED preferred

  • Diesel repair and maintenance experience in a heavy truck / DOT compliance

  • Factory trained certifications preferred

  • Possess own tools to perform work on all systems on diesel equipment

  • Knowledge of A/C system, brake system, emission systems, air systems and diagnostics/troubleshooting of diesel engines and trailer assemblies.

  • Basic computer skills with ability to use diagnostic programs

  • Must have a valid driver’s license with a clean driving record

  • Must be able to work a flexible schedule that includes night and weekend shifts

  • Must be able to pass a drug test, background check, and MVR check

    About Industrial Transport Services:

    Industrial Transport Services – or ITS, as we like to be called – is an over-the-road (OTR) truck driving company that specializes in the freight transportation of materials for our customers. ITS supports the operations of Warehouse Services, Inc. and by working together the two businesses are able to deliver world-class solutions to our customers. It is what sets us apart from the competition.

    Job Type: Full-time

    Salary: $20.00 /hour

    Work Location:

  • One location


  • Health insurance

  • Dental insurance

  • Vision insurance

  • Retirement plan

  • Paid time off


  • Diesel engines

  • Mechanic experience

    Pay Frequency:

  • Weekly

    Vehicle Type:

  • Heavy trucks

    Shop Type:

  • Fleet


  • Monday to Friday

  • Night shift

  • Other

    Company's website:

  • No
  • What does a Diesel Mechanic do?

    Diesel Mechanics typically work in repair shops, diagnosing and fixing mechanical problems on diesel-fueled vehicles and larger machines. They work with customers to understand the issue with their vehicle, determine what is needed to fix the car and develop a method for repairing it. Once they fix the vehicle, they perform preventive measures and techniques to keep the problem from reoccurring. 

    Diesel Mechanics often take inventory of parts for different vehicles and keep detailed records of all the vehicles they’ve serviced. Many Diesel Mechanics are also responsible for keeping the entire shop tidy and organized.

    Diesel Mechanic skills and qualifications

    Diesel Mechanics use a variety of technical and soft skills to provide the most comprehensive repair solutions they can, including:

    • Advanced knowledge of a vehicle, its electrical system and the mechanisms of a diesel engine
    • In-depth knowledge of diesel engine components and operational mechanisms
    • Superior knowledge of maintenance tools and repair equipment
    • Comfortable using mechanical and electrical power tools
    • Excellent problem-solving skills
    • Keen attention to detail
    • Basic knowledge of computer systems and other relevant electronics
    • Proficiency in the use of diesel engine diagnostic software
    • A valid driver’s license
    • Good interpersonal skills
    • Effective collaboration and communication skills

    Diesel Mechanic salary expectations

    A Diesel Mechanic earns an average of $24.03 per hour. Pay rate may depend on level of education, experience and geographical location.

    Diesel Mechanic education and training requirements

    The minimum education requirement for a Diesel Mechanic is a high school diploma or GED and certification and training in diesel engine repair from a vocational school or a community college. Training modules include drive trains, preventive maintenance, inspection, engine architecture and electronic systems. The most recognized and preferred certification is from the National Institute for Automotive Service Excellence for Diesel Mechanics with at least two years of work experience. Some candidates may have a degree in mechanical or automotive engineering, which also provides more in-depth theoretical and practical knowledge related to diesel engine repair.

    Diesel Mechanic experience requirements

    Entry-level Diesel Mechanics may have completed the practical learning experiences required to earn their vocational certification, while others may have one to three years of professional experience. Some candidates may also have completed an apprenticeship with an experienced Diesel Mechanic where they observed and practiced assessment and repair strategies under supervision. Other candidates may have completed or are willing to complete a company’s on-the-job training or apprenticeship program in which they observe and work under the supervision of an experienced, in-house Diesel Mechanic.

    Job description samples for similar positions

    If you’re looking for candidates for similar roles to the Diesel Mechanic, see our job description templates for related positions:

    Frequently asked questions about Diesel Mechanics


    What's the difference between a Diesel Mechanic and an Auto Mechanic?

    Though they both operate on and repair vehicles, Diesel and Auto Mechanics differ due to the types of vehicles they work on. A Diesel Mechanic inspects and fixes larger trucks and equipment that operates on diesel fuel. They usually fix larger equipment that workers use to complete heavy-duty tasks. Auto Mechanics work primarily on personal cars for their customers, diagnosing, repairing and inspecting vehicles, like SUVs and sedans. They mainly repair cars fueled by gas, rather than diesel-powered vehicles. 


    What makes a good Diesel Mechanic?

    Great Diesel Mechanics must be strong communicators, as they regularly work with team members and customers to uncover the issue with a vehicle and determine a strategy to fix it. They must also have critical thinking and problem-solving abilities to develop creative and valuable solutions to complex car maintenance problems. 

    Extensive knowledge in and experience working with vehicles is important for strong candidates to have, as they must know how certain parts of a vehicle work and which tools they need to repair it. Strong organizational and time management skills are also necessary, as they must regularly keep inventory of tools and parts and they must prioritize their large number of maintenance tasks accordingly.  


    Who do Diesel Mechanics report to?

    The person a Diesel Mechanic reports to often depends on the setting they work in. For larger mechanic shops with a team of Diesel Mechanics, they usually have a Diesel Mechanic Manager or a Shop Manager who builds their schedules and oversees the productivity of Diesel Mechanics. They also usually have experience working as a Diesel Mechanic themselves, so the Diesel Mechanic may go to them for any advice or guidance for overcoming a complex maintenance issue. 

    If they’re working in a smaller repair shop, the Diesel Mechanic may report directly to the shop owner for any questions, concerns or comments while on the job. 


    What are the different types of Diesel Mechanics?

    There are two main types of Diesel Mechanics. A general Diesel Mechanic works primarily on diesel engines, providing basic repairs and fixes to a variety of vehicles. Diesel Technicians work more closely with the computers in a vehicle to diagnose and resolve its maintenance issues. They may also use welding equipment to resolve any electrical problems happening to a vehicle. Some Diesel Mechanics receive the necessary education and training to perform both basic mechanical and complex technical repairs.

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