Yes, it is capitalized at the beginning of the sentence or when it forms part of the proper noun or when it precedes a person's name or when it is used as a direct address. Examples: Supervisor Anna Are you attending the meeting, Supervisor?
You capitalize all rank that is part of a title, for instance: Private Qunicy Sergeant Jones Captain Wally It is not necessary to capitalize rank that is not part of a title, for instance. "John wanted to become a sergeant in the US Army."
No, food vendor is not a proper noun. While it may be capitalized as a work position, it is not the name of a person, place, or thing.Positions are sometimes only capitalized when used as titles (President Obama is a president), but a specific position is capitalized when paired with a proper noun (Speaker of the House of Representatives). Titles such as manager and supervisor and head vendor would not qualify.
The British spelling of supervisor is "supervisor."
Yes, a Senior Supervisor must be a Category Supervisor.(See the Related question.)
or
SUPERVISOR
No, you have to be a Category Supervisor in order to become a Senior Supervisor. (See the Related question.)
Yes, Was it a dog? Hahaha It WAS capitalized! Was can be capitalized.
No, seasons are not capitalized.
The spelling for supervisor is supervisor; you had it spelled correctly in the question.
A Supervisor can be a Supervisor for however long he or she wants until the Supervisor deletes his/her account, is blocked or demoted for violating rules, or wants to quit being a Supervisor. If a supervisor remains inactive for a certain amount of time, he/she may have their supervisor powers taken away until he/she contributes again.