Chief Master Sergeant is the ninth, and highest, enlisted rank in the U.S. Air Force, just above Senior Master Sergeant, and is a non-commissioned officer.
There exists one post, Chief Master Sergeant of the Air Force, which is unique. The holder of this post represents the most senior enlisted member in the U.S. Air Force. The current incumbent is CMSAF Gerald R. Murray.
U.S. military enlisted ranks
CCM - CMSAF
CPL
1SG
CSM - SMA
1st Sgt
SgtMaj - SMOMC
CMCPO - MCPON