janitor

noun4

1. •
   (US, Philippines) Someone who looks after the maintenance and cleaning of a public building.
2. •
   (US, Scotland) A caretaker or custodian; someone who maintains a school building specifically and may serve other administrative roles (the term caretaker is also used in Hong Kong, particularly in ESF and independent British schools).
3. •
   (Internet, disapproving) A moderator for a discussion forum.
4. •
   A doorman.