As long as products and people need to get from one place to another in large volume, there will be a need for diesel-powered vehicles and diesel mechanics! Shipping continues to grow as an industry year after year, so the demand for technicians who are capable of servicing the large commercial trucks it requires continues to grow as well. While there is rarely a shortage of people who know how to work on cars, a good diesel tech can be hard to find and is always highly valued in this industry.