supervisor
/ˈsuːpɚˌvaɪzɚ/noun
Someone whose job is to watch over and direct the work of other people or of an operation.
Example sentences
- “If you have a complaint, please speak to the supervisor on duty.”
- “My supervisor approved my vacation request this morning.”
In universities, also the academic who guides a student's thesis. At work, 'boss' is the informal equivalent.