The U.S. have various titles for engineer. A company can give you that title, if you proved to them that you are capable of what they need. An university can give you that title if you taken their classes and graduated with that engineering degree, often taking 4 to 10 years, depending upon ability or situation. There are two exams for the license. No all engineers require license. If you are designing a computer or bicycle, then you do not need a license, a consumer item. If you are designing as dam, power station, or a public place, then you will need a license, PE, principal engineer. The first exam is given by the California consumer affairs - engineering society as the EIT. You will have to work for a principal engineer for a few years to be ready to take the PE, exam. Most houses are designed by anyone, no civil engineer required, just a city permit to build it. Commercial buildings are required to have a PE, principal engineer. All engineering and business carry some liability that is something for one to think about, but not dwell at it, just do a good job that is safe and checked by various people like my recumbent bicycle or in line ski roller skate.
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