Jack Ryan is the titular main protagonist of Ryanverse Tom Clancy's novel series and its adaptations. He is a former U.S. Marine lieutenant and stockbroker, Ryan worked as a civilian history professor at the United States Naval Academy. He became an analyst working for the Central Intelligence Agency during the Cold War. He goes up the ranks at the CIA, eventually becoming Deputy Director. After a brief retirement, Ryan served as National Security Advisor and Vice President before becoming President of the United States following a terrorist attack at the United States Capitol. He went on to serve two non-consecutive terms and mostly dealt with