('US') There are 100 people 'on staff'. [=working as members of the staff]
The department 'is staffed' with an equal number of men and women.
He has been 'on the staff' [=a member of the staff] for 25 years.
(..) You must learn to control it. Fear will be your enemy. No. We'll protect her. She can learn to control it. I'm sure. Until then, we'll lock the gates. We'll reduce the staff. We will limit her contact with people and keep her powers hidden from everyone... including Anna. Elsa? (..)2013 Frozen