What's the profession: music?
musician
What's the profession: electricity?
electrician
What's the profession: history?
historian
What's the profession: mathematics?
mathematician
What's the profession: bank?
banker
What's the profession: research?
researcher
What's the profession: novel?
novelist
What's the profession: guitar?
guitarist
What's the profession: assist?
assistant
What's the profession: consult?
consultant
What's the profession: account?
accountant
What's the profession: invent?
inventor
What's the profession: operate?
operator
What's the profession: invest?
investor
What do we call someone who instructs other people?
(driving) instructor
What do we call someone who works in chemistry?
chemist
