Master chief petty officer



Master Chief Petty Officer is the ninth, and highest enlisted rank in the UNSC Navy, just above Senior Chief Petty Officer and below Ensign, and they are the equivaent to Master Gunnery Sergeant in the Marines, and is a Non-commissioned officer.

In informal settings, Master Chief Petty Officers are typically called "Master Chief" or "Chief".

Known Master Chief Petty Officers

 * SPARTAN-117