chief information officer (CIO)

field officer (field-grade officer / senior officer)

chief of information

Chief Petty Officer (CPO)

Chief Staff Officer

chief warrant officer

Master Chief Petty Officer (MCPO)

Master Chief Petty Officer of the Navy

Senior Chief Petty Officer (SCPO)

chief operating officer

command senior chief petty officer

Chief Ordnance Officer

senior chief officer

compartmented information (sensitive compartmented information [SCI])

Information Management Officer (IMO)

public information officer

information officer

combat information center officer

Assistant Chief of Staff - Operations & Plans (G3)

assistant chief umpire

branch chief

Chief Intelligence Directorate of the Ministry of Defense of Ukraine

chief master sergeant

Chief of Combat Operations (CCO)

chief of defense (CHOD)

chief of military mission

Chief of Mission (COM)

Chief of Naval Operations (CNO)

chief of ordnance

chief of section

Chief of Staff (C-of-S; CofS, CoS)

Chief of Staff, United States Air Force (CSUSAF)

Chief of Staff, United States Army (CSUSA)