Senior chief petty officer
From Halopedia, the Halo wiki
Template:Ratings Template:Rank Infobox Senior Chief Petty Officer is the eighth enlisted rank of the UNSC Navy and is a non-commissioned officer. It is equal in rank to Master Sergeant and First Sergeant in the UNSC Marine Corps. It is also the rank before Master Chief Petty Officer.
In informal settings, Senior Chief Petty Officers are typically called "Senior".
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