Diana Maurer has been a Director in the U.S. Government Accountability Office’s (GAO) Homeland Security and Justice team since 2009, where she currently leads GAO’s work reviewing justice and law enforcement issues. Her recent work includes reports and testimonies on the federal prison system, the Secret Service, combating violent extremism, the FBI’s use of facial recognition technology and audio-video policies at the Supreme Court. She has testified more than two dozen times before Congressional committees on several issues, including national drug control policy, FBI whistleblower protection, U.S. Department of Justice oversight and nuclear smuggling. From 2008-9, Maurer worked as an Acting Director in GAO’s Natural Resource and Environment team, where she managed work assessing U.S. global nuclear detection programs and enforcement of federal environmental law. From 1993-2007, she managed and led work in GAO’s International Affairs and Trade team, where she reviewed U.S. efforts to combat international terrorism and proliferation of weapons of mass destruction, U.S. assistance to the former Soviet Union, peacekeeping in the Balkans, and several other international issues. Maurer began her GAO career in 1990 in GAO’s Detroit Regional Office, where she worked on military and environmental issues.