Librarian

undefined:

Librarian is role that is not to gather knowledge of the system as an archivist does, but instead to describe that the system member gathers knowledge in general and holds most of the things the system knows, system-related or not, in a headspace storage they may have.

(i would like to add that, depending on the date this was coined, butternut system https://www.tumblr.com/butterednuttered coined this term before.)