SEC is a Terran Dominion security organization, separate from the Dominion Marine Corps.

During an operation on Roxara's moon where a squad of marines encountered a zerg changeling, the sqaud's sergeant Walden Briggs found it imperative that SEC know of the situation. Later, when a contingent from the Dominion Marine Corps arrived, Briggs expressed surprise that they were not part of SEC.[1]


  1. Waugh, James. "Changeling." (November 18, 2009). Blizzard Entertainment. Changeling Accessed 2009-11-18.
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