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Our Leadership Team

Kenneth Dieffenbach

Kenneth Dieffenbach

Executive Director

Ken Dieffenbach was appointed as the Executive Director of the PRAC in June 2024. He brings over 28 years of experience in the oversight community and has served in various roles related to investigations and data analytics with the U.S. Air Force, the Department of Justice, and the Department of Energy. He is particularly passionate about grant fraud and fraud prevention and the fact that today’s oversight challenges require new and innovative approaches. As Executive Director, Mr. Dieffenbach leads the PRAC’s efforts with its 20-member federal Inspectors General to support and coordinate comprehensive oversight of the pandemic response, enhance transparency as to how the $5 trillion in relief was spent, and use data to detect fraud, waste, abuse, and mismanagement of funds.

Lisa Reijula

Associate Director, Outreach and Engagement

Cedric Campbell

Chief Counsel

Harsha Vakkalanka

Chief Information Officer

Hong Zhou

Chief Data Officer

Marcos Contreras

Chief Management Officer

Eugene Gray

Associate Director, Oversight and Accountability

Alice Siempelkamp

Acting Senior Strategist for Transparency and Data Integration