The security chief (or chief of security) is the officer in charge of the Starfleet Security of a starship or starbase.

In the Earth Starfleet, the armory officer was in charge of a ship's security department.

In the mid-23rd century Federation Starfleet a security chief, like Lieutenant Commander Giotto of the USS Enterprise (NCC-1701)was not necessarily a bridge officer.


In the 2270s, the role of security chief was combined with that of the Chief Tactical Officer. The Chief Tactical Officer could be a separate position or be combined with that of Chief Helm Officer or navigator.

In the 24th century, with helm and navigation consolidated in the new flight controller position, the chief tactical officer fulfilled the role of security chief.

On starbases, the chief of security is usually a separate position from the tactical officer.

Notable Security ChiefsEdit

  • Lieutenant Malcolm Reed, Enterprise
  • Lieutenant Pavel Chekov, USS Enterprise (NCC-1701)
  • Lieutenant Tasha Yar, USS Enterprise (NCC-1701-D)
  • Lieutenant Commander Worf, U.S.S. Defiant
  • Chief of Security Odo, Deep Space 9
  • Lieutenant Commander Tuvok, USS Voyager (NCC-74656)]

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