Biography

Thomas Joscelyn is a senior fellow at FDD and is senior editor of FDD’s Long War Journal, a widely read publication on counterterrorism and related issues. Much of his research focuses on how al-Qaeda and the Islamic State operate around the globe. He has served as a consultant for the FBI’s Counterterrorism Division and has testified before Congress on more than twenty occasions, including before the Senate Foreign Relations Committee, House Homeland Security Committee, House Foreign Affairs Committee, House Armed Services Committee, and House Judiciary Committee.

Thomas has constructed dossiers on hundreds of terrorists during the course of his work. The Daily Beast has described him as one of “the most trusted authorities on the al-Qaeda network because of his encyclopedic knowledge of terrorist biographies.” In 2017, as a result of Thomas’s efforts, the CIA declassified and released the vast majority of the files captured in Osama bin Laden’s compound. In 2007, he published a monograph titled, “Iran’s Proxy War Against America,” which details Iran’s decades-long sponsorship of America’s terrorist enemies. In 2008, he completed an exhaustive review of the Guantanamo Bay detainee population, cataloging and analyzing thousands of pages of declassified documents.

Thomas publishes the weekly Vital Interests newsletter for The Dispatch and co-hosts the Generation Jihad podcast. His work has been published by a variety of other publications and cited by The Associated PressThe New York Times, The Wall Street Journal, ReutersThe Washington Post, and many others. He makes regular appearances in the media.

Full Bio

FDD Analysis

In the News