The FBI announced Thursday it is offering a $200,000 reward for information leading to the apprehension and prosecution of Monica Witt, a former U.S. service member and counterintelligence agent who was indicted by a federal grand jury in the District of Columbia in February 2019 on charges of espionage, including transmitting national defense information to the Iranian government.

Witt, a former active-duty U.S. Air Force intelligence specialist and special agent for the Air Force Office of Special Investigations, served in the military between 1997 and 2008, before working as a U.S. government contractor until 2010, according to a news release from the FBI Washington Field Office.

The 47-year-old’s military service and contracting employment provided her access to secret and top secret information relating to foreign intelligence and counterintelligence, including the true names of U.S. Intelligence Community undercover personnel.

Officials allege that in 2013, Witt defected to Iran and provided information to the country’s government, placing sensitive and classified U.S. national defense information and programs at risk, according to the indictment.

She allegedly intentionally provided information endangering U.S. personnel and their families stationed abroad, and conducted research on behalf of the Iranian regime to allow them to target her former colleagues in the U.S. government.

The FBI said Witt’s defection to Iran has benefited the Islamic Revolutionary Guard Corps (IRGC), which has elements responsible for intelligence collection, unconventional warfare and providing direct support to multiple terrorist organizations targeting U.S. citizens and interests.

While Witt has been indicted for her alleged crimes, she remains at large.

She is known to speak Farsi and reside in Iran, and may be using aliases, including Fatemah Zahra or Narges Witt.

The FBI said it is continuing to actively work to find Witt and bring her to justice.

“Monica Witt allegedly betrayed her oath to the Constitution more than a decade ago by defecting to Iran and providing the Iranian regime National Defense Information and likely continues to support their nefarious activities,” said Daniel Wierzbicki, special agent in charge of the FBI Washington Field Office’s Counterintelligence and Cyber Division.

“The FBI has not forgotten and believes that during this critical moment in Iran’s history, there is someone who knows something about her whereabouts,” Wierzbicki continued.

“The FBI wants to hear from you so you can help us apprehend Witt and bring her to justice.”

Anyone with information about Witt is asked to contact the FBI at 1-800-CALL-FBI.