The top officer rank in the United States Air Force is the 5-star General of the Air Force. The top enlisted rank in the Air Force is Chief Master Sergeant of the Air Force.
The 5-star General of the Air Force rank is only used during wartime, so current Air Force members can only attain the 4-star rank of General Air Force Chief of Staff during peace-time. Before the four-star general rank comes the three-star rank of Lieutenant General, the two-star rank of Major General, and the one-star rank of Brigadier General. The top enlisted rank in the Air Force of Chief Master Sergeant of the Air Force is preceded by Command Chief Master Sergeant, Chief Master Sergeant and Chief Master Sergeant.