Chief of staff

Chief of staff is a title, held by a high-ranking officer or government official in an organization. A chief of staff can be a highest ranking military officer, and refers to an individual in a position tasked by a politically appointed commander-in-chief or an officer who organizes staff officers for another flag officer or commanding officer.

Federation

 * Federation Presidential Chief of Staff
 * Vilashrel th'Rithsiria
 * Penda Ubuntu
 * Emra Sil
 * Koll Azernal
 * Esperanza Piñiero

Starfleet

 * Starfleet Chief of Staff
 * Admiral Jonathan Archer (circa 2160s)
 * Admiral Marcus van Diemen (until 2244)
 * Starfleet Chief of Staff for Military Forces : Rear Admiral Baldridge (circa 2270)