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What does a Diesel Mechanic do?

Photo of Brenna Goyette
Brenna Goyette
Certified Professional Resume Writer, Career Expert

Published 4 min read

A diesel mechanic is a skilled tradesperson who maintains and repairs diesel engines and related equipment. Diesel mechanics are employed in a variety of settings, including trucking companies, construction firms, and agricultural operations. They perform preventive maintenance, diagnose engine problems, and make repairs.

Diesel Mechanic job duties include:

  • Inspecting diesel engines to diagnose problems
  • Repairing and rebuilding diesel engines
  • Replacing parts on diesel engines
  • Adjusting and repairing diesel engine components
  • Testing diesel engines to ensure they are functioning properly
  • Cleaning and maintaining diesel engine parts
  • Troubleshooting issues with diesel engines
  • Providing preventative maintenance on diesel engines
  • Coordinating with other mechanics to complete repairs

Diesel Mechanic Job Requirements

Diesel mechanics typically need to have a high school diploma or equivalent, although some jobs may require postsecondary education, and most employers provide on-the-job training. Some diesel mechanics may choose to pursue voluntary certification. Certification can demonstrate competence and may help a mechanic find a job or get promoted. Many diesel mechanics learn their trade through an apprenticeship, which can last up to four years. Some states require licensure for diesel mechanics who work on vehicles with gross vehicle weights over 26,000 pounds.

Diesel Mechanic Skills

  • Diesel engine repair
  • Diesel fuel injection systems
  • Troubleshooting diesel engines
  • Diesel emissions control
  • Diesel exhaust after-treatment
  • Diesel electrical systems
  • Diesel air conditioning systems
  • Heavy-duty truck brakes
  • Heavy-duty truck suspension
  • Differential and drive train repair
  • Welding and fabricating

Related: Top Diesel Mechanic Skills: Definition and Examples

How to become a Diesel Mechanic

There are many reasons why someone might want to become a diesel mechanic. For some, it may be the challenge of working on big, powerful machines. Others may be drawn to the idea of being their own boss, or working in a field that is essential to keeping the economy moving. Whatever the reason, there are a few things that anyone interested in becoming a diesel mechanic should know.

First and foremost, it is important to have a strong understanding of how diesel engines work. This can be gained through coursework at a trade school or community college, or through on-the-job training. Many employers will require certification from an accredited program before hiring a diesel mechanic, so it is important to do your research and choose a program that will best fit your needs.

Once you have the necessary education and/or training, it is time to start looking for a job. There are many different places that diesel mechanics can find employment, from trucking companies to construction firms. It is important to find an employer that offers both on-the-job training and continuing education opportunities, as this will help you stay up-to-date on the latest advances in diesel technology.

With the right education and training, and a little bit of hard work, anyone can become a diesel mechanic. It is a challenging and rewarding career that can provide both personal and financial satisfaction.

Related: Diesel Mechanic Resume Example

Related: Diesel Mechanic Interview Questions (With Example Answers)

Editorial staff

Photo of Brenna Goyette, Editor

Editor

Brenna Goyette

Expert Verified

Brenna is a certified professional resume writer, career expert, and the content manager of the ResumeCat team. She has a background in corporate recruiting and human resources and has been writing resumes for over 10 years. Brenna has experience in recruiting for tech, finance, and marketing roles and has a passion for helping people find their dream jobs. She creates expert resources to help job seekers write the best resumes and cover letters, land the job, and succeed in the workplace.

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