Juliette N. Kayyem is an American former government official and author. She is the Robert and Renée Belfer Senior Lecturer in International Security at the Harvard Kennedy School, where she also serves as Faculty Chair of the Homeland Security Project. She is host of the Boston-based radio channel WGBH (FM)'s podcast The SCIF, and has also appeared on CNN and Boston Public Radio, and written columns for The Boston Globe.