steward

1. A person who manages the property or affairs for another entity, particularly the chief administrator of a medieval manor.
2. A ship's officer who is in charge of making dining arrangements and provisions.
3. A flight attendant, a male flight attendant.
4. A union member who is selected as a representative for fellow workers in negotiating terms with management.
5. A person who has charge of buildings and/or grounds and/or animals.
6. A fiscal agent of certain bodies.

   a steward in a Methodist church

7. In some colleges, an officer who provides food for the students and superintends the kitchen; also, an officer who attends to the accounts of the students.
8. In Scotland, a magistrate appointed by the crown to exercise jurisdiction over royal lands.
9. In information technology, somebody who is responsible for managing a set of projects, products or technologies and how they affect the IT organization to which they belong.

verb

To act as the steward or caretaker of (something)