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


Example 1

*Main include: * * Lubing and greasing * Changing coolant, oil and filter * Repairing and replacing lights * General inspection of equipment * Change fittings * Inspecting and replacing bearings * Repairing electrical problems, air leaks and ABS systems * Installation and diagnostic of ELD device * May do some diagnostic work * Additional (based on having a CDL License): * Test drive equipment * Taking trucks/trailers to repair shop as needed A successful candidate will be dependable, safety conscious, have consistent on-time performance, strong customer service skills, and the ability to follow instructions. *Basic Qualifications: * * Valid Driver’s License * Must have their own basic tools – specialty tools will be provided by Summit *Experience: * * Seasoned truck/trailer mechanics are strongly recommended to apply * Entry Level positions also available *BONUS Qualifications: * * Class A Commercial Driver’s License (CDL) Job Type: Full-time Pay: $20.00 - $31.50 per hour Benefits: * Paid time off Schedule: * 8 hour shift * Monday to Friday Experience: * Diesel engine repair: 1 year (Preferred) * Mechanical knowledge: 1 year (Required) Work Location: One location

Example 2

A *Diesel Mechanic’s* ultimate responsibility is to provide exceptional service to our customers. These are some of the responsibilities which will need to be performed. * Provide technical service to vehicles and equipment. * Perform general and detailed repair of all trucks, engines and components. * Read job order, observe and listen to vehicle in operation to determine malfunction and plan work procedures. * Attend training classes and keep abreast of factory technical bulletins. * Develop and maintain positive relationships with customers to increase overall customer satisfaction. *Benefits: * Our benefits plan is designed to ensure that our Diesel Technicians are set up for success. Our benefits ensure we have a great place to come to work each day, financial security, and career growth. We offer an extensive health plan, company paid OEM certifications and training, paid time off, incentives for performance, 401K and stock options, and opportunity for advancement. All of this in a culture that appreciates and rewards excellence, a positive attitude and integrity. *Basic Qualifications: * * High school diploma or general education degree (GED) * 5 years’ experience as a Class 7 & 8 technician in a dealership or related truck service facility Equal Opportunity Employer Minorities/Women/Protected _This job posting does not state or imply that these are the only duties to be performed by this employee. The employee will be required to follow any other instructions and to perform any other duties requested by their leader._ Job Type: Full-time Pay: $28.00 - $42.00 per hour Benefits: * 401(k) * 401(k) matching * Dental insurance * Health insurance * Life insurance * Paid time off * Vision insurance Schedule: * Monday to Friday Work Location: One location

Example 3

*Diesel Mechanic and Farm Hand * *Job Summary * This position is responsible for maintenance on tractors, trucks, and other farm equipment. Conducting ongoing maintenance and services along with breakdown service. This position also entails some tractor and truck driving. *Responsibilities * * Equipment servicing and maintenance including oil/air filters, greasing and safety checks. * Wear point replacement and inspection. * Brake and suspension checks and service. * Field checks and fueling * Part ordering and supply ordering *Qualifications and Skills * * Understanding of mechanical devices * Attention to detail and ability to prioritize work * Skills in engine codes and computer interfaces will be addressed in compensation * Basic Math, fluent English * Positive attitude * Basic computer skills *Benefits and Compensation * * Hourly wage $30-40 / hour depending on experience and skills * Company paid health care for employee * 401 K eligibility after 1000 hours (6 months) * Paid Time Off – flexible to allow you to use for Sick, Vacation or Other * Family-Owned business with long term employees and involved in our community. We are a growing company with room for advancement. We are a full production farm, producing hops, row crops, grass seed, specialty seed, and hazelnuts. We also have a full greenhouse operation that does self delivery. Contact us at F&B Farms and Nursery [phone number]Geschwill Lane NE Woodburn, Oregon [phone number] Job Type: Full-time Pay: $30.00 - $40.00 per hour Benefits: * 401(k) * 401(k) matching * Health insurance * Paid time off Schedule: * 10 hour shift * 8 hour shift * Monday to Friday * Weekend availability COVID-19 considerations: N/A at this location. Ability to * Woodburn, OR 97071: Reliably commute or planning to relocate before starting work (Preferred) Application Question(s): * Have you worked for a farming, nursery, ranching or forestry company before? If so, how long? Experience: * Diesel engine repair: 3 years (Required) Work Location: One location

Example 4

*Diesel Mechanic Technician Duties* * Perform routine preventative maintenance and general reconditioning of equipment on Class 1 through Class 8 vehicles * Diagnose, document, and repair engine fault codes (Company supplied OEM software) following proper warranty procedures * Repair / Replace brakes, steering components, suspension, and perform alignments * Replace clutches & transmissions *You Have: * * Completed Technical School * Experience or formal training diagnosing, repairing, and maintaining Class 1-7 diesel tractors * The ability to acquire a Commercial Driver License with the assistance of our trainer * Hand tools * Flexibility to work evenings and Saturdays * The ability to pass a physical and drug test *You Might Also Have: * * 3+ Years of experience as a Diesel Technician * A valid CDL (Class A or B) * Experience working on a Refrigeration Unit *We Have: * * Highly competitive compensation * Shift Differentials * Paid Vacation and Holidays * Excellent set schedules with individual flexibility * Multiple Health plans to choose from * 401(k) with a company provided match * Career Advancement Opportunities for Technicians at all levels * Robust in-person and online training programs, including NJ Emissions Training If you are looking for a great, safe work environment, look no further. Miller is proud to be an Equal Opportunity Employer and Drug Free workplace. All qualified applicants will receive consideration for employment without regard to race, religion, color, national origin, sex, sexual orientation, gender identity, age, status as a protected veteran, among other things, or status as a qualified individual with disability. Job Type: Full-time Pay: $18.00 - $36.00 per hour Benefits: * 401(k) * 401(k) matching * Dental insurance * Employee assistance program * Employee discount * Health insurance * Health savings account * Life insurance * Paid time off * Professional development assistance * Referral program * Vision insurance Schedule: * Monday to Friday * Weekend availability Education: * High school or equivalent (Required) Experience: * Diesel Technician: 1 year (Preferred) * Driver's License (Preferred) * Diesel Mechanic Certification (Preferred) Work Location: One location

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.

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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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