The FBI has released a report highlighting the threat posed by hostile foreign intelligence services to former U.S. government clearance holders as evidenced by the recent arrests of three ex-members of the U.S. intelligence community on espionage charges. The report notes that foreign intelligence officers primarily use two methods to approach former clearance holders: 1) via professional networking websites and 2) by contacting former clearance holders who reside in or regularly travel to their countries. Recent cyber intrusions into U.S. government websites, such as the Office of Personnel Management databases, have enabled foreign intelligence services to identify former clearance holders who they can then target for compromise. The report provides a list of potential indicators of being targeted by a foreign intelligence service and encourages its partners to conduct basic vetting of foreign contacts and report suspicious interactions.