From where though? I've seen about high-class nannies, and presumably they might work their way up to being housekeepers (by which I mean managers of households as opposed to cleaner/cook type positions).

In the past private school fags, or military batmen presumably might follow a "gentleman" in to later service, but I don't see where it fits in now? I'd guess it must be like being an equerry, about social positioning in the first place?