Chief

Chief is a common designation for leading officers and enlisted people aboard Federation starships and installations.

Starfleet Ranks and Titles

 * Chief engineer, head of the engineering department on a starship
 * Assistant chief engineer, second-in-command of the engineering department on a starship
 * Chief medical officer, head of the medical department on a starship
 * Chief of operations, head of the operations on a starbase or space station
 * Chief petty officer, rank given to senior enlisted personnel
 * Master chief petty officer, the highest CPO rank
 * Senior chief petty officer, a senior CPO rank
 * Chief tactical officer, in charge of Tactical stations on a starship
 * Commander in chief, in charge of Starfleet
 * Chief of staff, in charge of Starfleet personnel
 * Chief of Starfleet Intelligence, in charge of Starfleet Intelligence
 * Chief of Starfleet Operations, in charge of Starfleet Operations
 * Transporter chief, in charge of transporter operation on a starship
 * Security chief, in charge of security on a starship or at a Starfleet facility

Other Cultures

 * Chief Archon, a Cardassian judge
 * Chief Financial Officer, a senior position in the Ferengi Alliance