CMSgt insignia (1994–present) Chief Master Sergeant (CMSgt) is the ninth, and highest, enlisted rank in the U.S. Air Force, just above Senior Master Sergeant, and is a senior non-commissioned officer rank. The official term is `Chief Master Sergeant` or `Chief`. Attaining the rank of Chief Master Sergeant is the pinnacle of an Air Force enli...
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http://en.wikipedia.org/wiki/Chief_master_sergeant
the highest noncommissioned officer rank in the U.S. Air Force.
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https://www.infoplease.com/dictionary/chief-master-sergeant
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