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No you need a degree
A vulcanologist.
previous experience as a hooker
find it out on your own
a vulcanologist is you and me
vulcanologist
Vulcanologist.
volcano's
A person who studies volcanoes is called a volcanist, volcanologist, or (historically) a vulcanologist.
Previous education experience is necessary for some jobs with K12. There are also many jobs for which previous education experience is not a requirement for employment.
Assuming this is a grammar question, experience is a singular noun. In this instance, "previous experience has become" is the proper conjugation. Have would be used if the noun experience was plural. For example: "My previous experiences have become...."
Court justices do, in fact, need previous legal knowledge and expertise. They usually possess a juris doctorate and have many years of experience with law.