Ari Heistein is an advisor to Israeli startups seeking to sell to the U.S. federal government and a consultant on issues relating to Yemen. He has previously worked in business development for an Israeli cyber intelligence company and served as a research fellow and chief of staff at the Institute for National Security Studies (INSS) in Tel Aviv. Over the past year, his work on Yemen has focused on Houthi arms procurement, information operations, the Security and Intelligence Service, exploitation of humanitarian assistance, terror financing, and telecommunications in Yemen.