Duties:

- Responsible for controlling a starship's weaponry & shields
- Security chiefs frequently doubled as tactical officers

Post Holders:

- Malcolm Reed (Enterprise NX-01)
- Gen Rhys (USS Discovery)
- Pavel Chekov (USS Enterprise & USS Enterprise-A)
- Natasha Yar (USS Enterprise-D)
- Worf (USS Enterprise-D & USS Enterprise-E)
- Daniels (USS Enterprise-E)
- Tuvok (USS Voyager)