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Sean O'Donnell

Acting Inspector General

Mr. Sean O’Donnell joined the Department of Defense Office of Inspector General (DoD OIG) as the Acting Inspector General (IG) on April 6, 2020. Mr. O’Donnell is also the Inspector General of the U.S. Environmental Protection Agency (EPA) and was sworn in on January 27, 2020. Mr. O’Donnell serves as the Acting DoD IG in addition to his current duties as the EPA IG.

Mr. O’Donnell previously served at the U.S. Department of Justice for 15 years, most recently as a prosecutor in the Criminal Division’s Money Laundering and Asset Recovery Section.

Early in his career, Mr. O’Donnell clerked for U.S. Circuit Judge Raymond Gruender on the U.S. Court of Appeals for the Eighth Circuit and U.S. District Judge Harry Lee Hudspeth on the U.S. District Court for the Western District of Texas. He also spent time in private practice, working on intellectual property and antitrust litigation, among other matters.

Mr. O’Donnell has a bachelor’s degree in economics from Texas A&M University, a bachelor’s degree in mathematics from the University of Washington, and a master’s degree in economics and a law degree from the University of Texas at Austin.