Director of Staff of the United States Air Force

The Assistant Vice Chief of Staff of the United States Air Force was a position in the United States Air Force held by a lieutenant general who also served as the director of the Air Staff. The holder of the position oversees the administration and organization of the Air Staff, which develops policies, plans and programs; establishes requirements; and provides resources to support the Air Force's mission.

Source: Wikipedia — Director of Staff of the United States Air Force (CC BY-SA 4.0)