All UW System employees are state employees.

At UWM and some other UW System institutions, librarians have "academic
status": a compromise which keeps them from union representation;
THEORETICALLY includes them in the "shared governance" system; but
excludes them from any kind of tenure-type protection.

Library Service Assistants and other clericals are represented by
AFSCME, which started out 75 years ago as the Wis. State Employees
Association (we're the Mother Church of the whole union, so to speak).