The Breen High Administrator was a position held by the Breen government.

In the Mirror Universe, the Breen High Administrator was one of seveal individuals within the Klingon-Cardassian Alliance that was attempting to gain the position of Overseer. During the course of the talks, the cool headed Administrator ended up in an argument with the Andorian Intendant. After Kira Nerys was voted Overseer, the Breen High Administrator backed down. (DS9 novel: Dark Passions)

It's unknown whether this position had a counterpart in the Breen Confederacy of the standard universe.
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