Wikipedia (en)
John Owen Brennan (born September 22, 1955) was the Director of the Central Intelligence Agency (CIA) from March 2013 to January 2017. He has served as chief counterterrorism advisor to U.S. President Barack Obama; his title was Deputy National Security Advisor for Homeland Security and Counterterrorism, and Assistant to the President. His responsibilities included overseeing plans to protect the country from terrorism and respond to natural disasters, and he met with the President daily. Previously, he advised President Obama on foreign policy and intelligence issues during the 2008 presidential campaign and transition. Brennan withdrew his name from consideration for Director of the Central Intelligence Agency (CIA) in the first Obama administration over concerns about his support for transferring terror suspects to countries where they may be tortured while serving under President George W. Bush. Instead, Brennan was appointed Deputy National Security Advisor, a position which did not require Senate confirmation.
Brennan's 25 years with the CIA included work as a Near East and South Asia analyst, as station chief in Saudi Arabia, and as director of the National Counterterrorism Center. 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.
Brennan served in the White House as Assistant to the President for Homeland Security between 2009 and 2013. As such, he was put in charge of the Disposition Matrix.
President Barack Obama nominated Brennan as his next director of the CIA on January 7, 2013. The ACLU called for the Senate not to proceed with the appointment until it confirms that "all of his conduct was within the law" at the CIA and White House. John Brennan was approved by the Senate Intelligence Committee on March 5, 2013, to succeed David Petraeus as the Director of the CIA by a vote of 12 to 3.
Brennan serves as a senior national security and intelligence analyst for NBC News and MSNBC, with his inaugural appearance being on Meet the Press with Chuck Todd on Sunday, February 4, 2018.
In 2016, Brennan's personal email accounts were hacked, and his personal emails were released on Wikileaks.