- Counterterrorism Division (CTD) focuses on both domestic and international terrorism. It oversees Joint Terrorism Task Forces (JTTFs);
- Counterintelligence Division (CD) prevents and investigates foreign intelligence activities within the U.S. and espionage activities in the U.S. and overseas;
- 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.