The Department of Justice has charged a former Air Force intelligence specialist with spying on behalf of Iran, according to a grand jury indictment unsealed Wednesday.

Monica Elfriede Witt, 39, who served in the Air Force until 2008, when she became a contractor for the Department of Defense, is accused of giving the Iranians code names and the mission of a secret Pentagon program involving U.S. intelligence operations, as well as revealing the identity of a U.S. intelligence officer. She defected to Iran in 2013 after being recruited by the country.