I haven’t found her connection to Flynn or McCrystal yet, but definitely she’s clapper’s girl.
Stephanie O’Sullivan
She was nominated by President Barack Obama on January 5, 2011 at the recommendation of Director James R. Clapper. On February 15, 2011, the Senate Intelligence Committee voted unanimously to recommend O'Sullivan's confirmation to the Senate, which later unanimously confirmed her.
In November 2020, O'Sullivan was named a volunteer member of the Joe Biden presidential transition Agency Review Team to support transition efforts related to the United States Intelligence Community.[6]
https://en.m.wikipedia.org/wiki/Stephanie_O'Sullivan