Conversation so far:
What were John O. Brennan career highlights?
Obama twice nominated Brennan to serve as Director of the Central Intelligence Agency.
What is notable about John O. Brennan time in the CIA?
While director, Brennan created ten new mission centers in his campaign to focus the CIA on threats in cyberspace
What did John O. Brennan do under President Bush?
He was director of the newly created Terrorist Threat Integration Center from 2003 to 2004
What was John O. Brennan job as director of the terrorist threat integration center?
Sifted through and compiled information for President Bush's daily top secret intelligence briefings and employed the services of analysts from a dozen U.S. agencies and entities.

Question: What else has he done in his career?
Self-contained rewrite: What else has has John O. Brennan done in his career that is notable besides his time in the CIA and Terrorist Threat Integration Center?