• Chief, Office to Counter Soviet Disinformation and Active Measures, U.S. Information Agency (1983-1989)
• Professional staff member, U.S. House of Representatives Permanent Select Committee on Intelligence (1978-1983)
• Minority Chief Investigator, House Committee on Internal Security (1971-1975)

Professor Romerstein is the author of The Venona Secrets, The KGB Against the Main Enemy, and Heroic Victims: Stalin's Foreign Legion in the Spanish Civil War, and co-editor, The Grenada Documents.