Custodian

n. supervisor; warden; guard; janitor, caretaker

The term Custodian may refer to:Janitor, a person (at least in the United States) who cleans and maintains buildingsCustodian bank, an organization responsible for safeguarding a firm's or individual's financial assets.Custodian helmet, the helmet worn by many members of the British Police ForceA legal guardian or conservator may be called a custodian in some jurisdictions
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Noun
1. one having charge of buildings or grounds or animals
(synonym) keeper, steward
(hypernym) defender, guardian, protector, shielder
(hyponym) caretaker

v. keep; guard

(n.)
One who has care or custody, as of some public building; a keeper or superintendent.