As a consultant, you might be called upon to provide professional testimony for a number of settings. For instance, you might have to give a statement on your professional opinion for a legal proceeding.
CAD stands for computer-aided design – but you probably already know that if you’re a mechanical engineer, since this is something that all professionals in this discipline take numerous classes in.
You could create a blog to help engineering students prepare for exams or start a YouTube channel about something that’s not even related to engineering at all!
If you’re interested in sharing your knowledge of mechanical engineering with the rest of the world, this is a side hustle that has unlimited income potential.