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Ken Dieffenbach, CFE


Since 2003, Ken Dieffenbach has served as a special agent with the U.S. Department of Justice, Office of the Inspector General, Fraud Detection Office located in Arlington, Virginia. He has led dozens of complex and sensitive fraud and internal misconduct investigations and has made well over 100 presentations about fraud to a wide variety of audiences. He is an adjunct instructor at the Federal Law Enforcement Training Center, coordinates DOJ’s Fraud Task Force’s Grant Fraud Working Group, and has had articles published in the ACFE’s Fraud Magazine and the NonProfit Times newspaper. In his current role, Dieffenbach is the Special Agent-in-Charge managing a nationwide team focused on contract fraud and proactive data analytics and is the Deputy Director of the Office of Data Analytics. His work has been recognized with numerous awards including the Attorney General’s Distinguished Service Award. Prior to his current position Dieffenbach served over six years as an active duty officer special agent with the United States Air Force Office of Special Investigations. He received his undergraduate degree in business and accounting from the Citadel in Charleston, South Carolina, and his graduate degree in criminal justice from the University of Alabama at Birmingham.