Ari Heistein is a research fellow at the Jerusalem Institute for Strategy and Security (JISS), and a nonresident fellow at the Counter Extremism Project. He also serves as a consultant to Israeli startups, enabling the sale of defense and dual-use technologies to the U.S. federal government. He previously worked as a research fellow and chief of staff at the Institute for National Security Studies (INSS) in Tel Aviv and in business development for an Israeli cyber intelligence company.