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Mechanical engineering requires a bachelor's degree in Mechanical Engineering. Typically students may wook for summer internships or co-ops while in school to get some background, but it is not required to get into the field.
Mechanical engineers need to possess several key qualities:
In addition, higher level jobs can be obtained through a Prefessional Engineer's license. This license requires an engineering degree, professional experience, and passing an exam.
https://www.bls.gov/ooh/architecture-and-engineering/mechanical-engineers.htm