Chief may refer to: Title or rank. Military and law enforcement. Chief master sergeant, the ninth, and highest, enlisted rank in the U.S. Air Force and U.S. Space Force. Chief of police, the head of a police department. Chief of the boat, the senior enlisted sailor on a U.S. Navy submarine. Chief petty officer, a non-commissioned officer or equivalent in many navies. Chief warrant officer, a military rank. Other titles. Chief x officer, a corporate title in the c-suite. Chief of the Name, head of a family or clan.
https://en.wikipedia.org/wiki/Chief