('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.
(..) behind your teeth. I have not passed through fire and death... ...to bandy crooked words with a witless worm. His staff. I told you to take the wizard's staff. Th'oden... ...son of Thengel... ...too long have you sat in the Shadows. (..)2002 The Lord of the Rings: The Two Towers
(..) Your words are poison. You'll find more cheer in a graveyard. I cannot allow you before Th'oden King so armed, Gandalf Greyhame. By order of Gr'ma Wormtongue. Your staff. You would not part an old man from his walking stick. My lord, Gandalf the Grey is coming. He's a herald of woe. (..)2002 The Lord of the Rings: The Two Towers