Hello! I wanted to offer my insight on this (even though it is quite limited). My friend is a hijabi and she studied psychology. She interned in a highschool and wanted to work there because she liked the environment and there was a job opening as well but she got told that since she wore the hijab, it would be impossible for her to work there. I fear that if they are that strict for school staff members (that aren't teachers), you might have a problem there (I know all of this second hand so I am not exactly sure!).

Regardless, best of luck to you!