John O. Brennan

John O. Brennan (born September 22, 1955) is chief counterterrorism advisor to U.S. President Barack Obama; officially his title is Deputy National Security Advisor for Homeland Security and Counterterrorism, and Assistant to the President. Brennan withdrew his name from consideration for Director of the CIA in the new Obama administration over concerns about his views regarding the CIA under President George W. Bush.

After leaving government service in 2005, Brennan became CEO of The Analysis Corporation, a security consulting business, and served as chairman of the Intelligence and National Security Alliance, an association of intelligence professionals.<ref...
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