- The Counterterrorism Division (CTD) focuses on both domestic and international terrorism. It oversees Joint Terrorism Task Forces (JTTFs);
- The Counterintelligence Division (CD) prevents and investigates foreign intelligence activities within the U.S. and espionage activities in the U.S. and overseas;
- The Directorate of Intelligence (DI) is the FBI's intelligence analysis component. It has embedded employees at FBI Headquarters and in each field office through Field Intelligence Groups (FIGs) and fusion centers; and the
- Weapons of Mass Destruction Directorate (WMDD) prevents individuals and groups from acquiring WMD capabilities and technologies for use against the U.S., and links all operational and scientific/technology components to accomplish this mission.
The National Security Branch combines the missions, capabilities, and resources of each.