Dr. Sebastian Gorka is a British-born American military and intelligence analyst, who was a deputy assistant to US President Donald Trump in 2017. He served from January 2017 until August 25, 2017, when, according to Gorka, he resigned because White House officials were undermining the Make America Great Again platform. Other sources reported that he had been asked to leave the administration, and was no longer allowed back in the White House. He is currently a Fox News contributor. Gorka was born in the United Kingdom to Hungarian parents, lived in Hungary from 1992 to 2008, and in 2012 became a naturalized American citizen.

Gorka worked in the Hungarian Ministry of Defense during the prime ministership of József Antall. Following the September 11 attacks, Gorka became a public figure in Hungary as a televisioncounterterrorism expert. This led to his being asked in 2002 to serve as an official expert on the parliamentary investigatory committee created to uncover the Communist background and alleged counterespionage of the new Hungarian Prime Minister Péter Medgyessy.[25][26] Gorka failed to obtain the necessary security clearance from the Constitution Protection Office to serve on the committee, apparently because he was widely regarded as a spy working for British counterintelligence. Gorka defended himself against the charge by saying his service in the British army was merely as a uniformed member of its counterterrorist unit, tasked with assessing threats from groups such as theIRA.

In 2004, Gorka became an adjunct to the faculty of the new US initiative for the Program for Terrorism and Security Studies (PTSS), a Defense Department-funded program based in the George C. Marshall European Center for Security Studies in Garmisch-Partenkirchen, Germany. At the same time Gorka became an adjunct to USSOCOM’s Joint Special Operations University, MacDill Air Force Base. He and his family relocated to the United States in 2008. He was hired as administrative dean at the National Defense University, Fort McNair, Washington D.C. Two years later, he began to lecture part-time for the ASD(SOLIC)-funded Masters Program in Irregular Warfare and Counterterrorism as part of the Combating Terrorism Fellowship Program but remained in a largely administrative role.[27] Between 2009 and 2011 Gorka wrote for the Hudson Institute of New York (now Gatestone Institute).[28] Between 2011 and 2013, Gorka was an adjunct faculty member at Georgetown University’s McCourt School of Public Policy. In 2014 Gorka assumed the privately endowed Major General Horner Distinguished Chair of Military Theory at the Marine Corps University Foundation.[5] From 2014 to 2016, Gorka was an editor for national security affairs for Breitbart News, where he worked for Steve Bannon. In August 2016, he joined The Institute of World Politics, a private institution, on a full-time basis as Professor of Strategy and Irregular Warfare and Vice President for National Security Support. He is on the advisory board of the Council for Emerging National Security Affairs (CENSA).