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Dermot F. O’Reilly

Deputy Inspector General for Investigations and Director of the Defense Criminal Investigative Service (DCIS)

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Dermot F. O’Reilly was selected as the Deputy Inspector General for Investigations and Director of the Defense Criminal Investigative Service (DCIS) on Sept. 16, 2016. Prior to this assignment, he spent two years as an Assistant Inspector General for Investigations with executive responsibility for the agency’s international operations, to include investigative units across Southwest Asia as well as its national security and cyber investigative programs.     

Prior to joining the OIG, O’Reilly spent 22 years as a special agent with the Air Force Office of Special Investigations (AFOSI). He began his career in Boston investigating violent crime and fraud impacting Department of Defense interests throughout New England. He has served as the Resident Agent-in-Charge of the AFOSI office in London, UK; the Chief of the Inspections Division, and has held several senior leadership assignments in the national security arena, including time as the Acting Special Agent-in-Charge of the Office of Special Projects. 

In 2009, O’Reilly was selected to fill a joint duty assignment at the National Reconnaissance Office. O’Reilly returned to AFOSI in 2012 and reported as Deputy Executive Director, assisting in the leadership of the agency’s enterprise management portfolio. During this posting, O’Reilly deployed to Afghanistan where he served as Director of a joint unit conducting operations supporting the International Security Assistance Force (ISAF).

O’Reilly has a bachelor’s degree from Saint Joseph’s University, a master’s degree from Harvard University, and a master’s degree from the National War College. He is the recipient of several awards including the Meritorious Service Medal, the NRO’s Superior Service Award and the Outstanding Civilian Service Medal for his time in Afghanistan.