Aaron Cohen grew up in Los Angeles, California. After spending three years in Israel's "counter-terrorist " special operations undercover unit, Duvdevan, he returned home and founded IMS Security, a consulting firm that specializes in providing tactical counter-terrorist training to the United States military, to local and state police departments, and to various SWAT units around the country and offers protective services to politicians, business executives, Hollywood actors, and rock stars. Cohen's bestselling first book, Brotherhood of Warriors: Behind Enemy Lines with a Commando in one of the World's Most Elite Counter-terrorist Units, was published by Ecco/Harper Collins in April 2008. He lives in Los Angeles.