Chief Tactical Officer is a senior position for Starfleet officers onboard starships and starbases. Tactical officers are in charge of tactical operations, including weaponry and shields, and ship security.
There was no Chief Tactical officer onboard Constitution class starships in the 23rd century. Weapons control was handled by the navigator when needed and security was handled by the ship's security officers.
Star Trek Chief Tactical Officers
- Lieutenant Malcolm Reed (NX-01 Enterprise)
- Lieutenant/Lieutenant Commander Worf (USS Enterprise-D)
- Lieutenant Commander Worf (USS Enterprise (NCC-1701-E)) (Since Worf was not serving full time on the Enterprise-E, there were probably other Chief Tactical officers)
- Lieutenant Commander Worf (USS Defiant) (Though on some occasions, Worf was in command)
- [[Lieutenant]/Lieutenant CommanderTuvok (USS Voyager) (Though called 'Chief of Security', he was the Chief Tactical Officer)