Meet the Staff

Gregory Hill, JD – Executive Director

Greg joins the AIG after serving as legal counsel to the OIG at Florida Department of Corrections.  He has served as the executive director and deputy executive director at Arizona State University College of Law’s Indian Legal Program and Stetson University College of Law’s National Clearinghouse of Science, Technology and Law, respectively.  As the Chief Assistant Regional Counsel of Florida’s Office of Criminal Conflict and Civil Regional Counsel, First DCA, he oversaw the daily operations of 16 regional offices and more than 130 attorneys and staff with an annual budget of $11 million.  He has previously served as a contract auditor (legal compliance) for the U.S. Department of Justice, Office of Justice Programs auditing forensic science grants.  His 25 years of legal practice has focused on criminal justice, including death penalty litigation in Florida.  In what he describes as his “prior life” Greg served as a City of Tampa police officer for nearly ten years.

Greg earned his Juris Doctorate from SUNY at Buffalo School of Law and his Bachelor of Arts, majoring in Criminology, from Saint Leo University.

Michael Castrilli, MPA – Program Director

As Program Director, Michael is responsible for the Association’s professional development portfolio, including AIG Institute® programs, Annual Training Conference, and webinar programs. Before joining AIG, Michael was a Senior Program Director at Working in Support of Education (W!se). Michael directed W!se’s national financial literacy certification programs for high school students and educators. Previously, Michael was a business fellow at Villanova University’s School of Business, where he taught graduate courses in the Master of Science in Church Management program. Michael has served in multiple capacities as a strategic adviser, trainer, and executive facilitator to Fortune 500 companies, government agencies, and nonprofit organizations.

Michael began his career in Washington, DC as a Presidential Management Fellow at the US Department of Justice. He received a MPA from the Maxwell School of Citizenship and Public Affairs at Syracuse University, a MDiv from the Washington Theological Union, and a BA in education from the University at Albany, SUNY.

Frank Chen, PhD – Research & Publications Director

As the Research & Publications Director, Frank is responsible for planning and developing scholarly research and publications for the Association of Inspectors General (AIG). His research interests include discontinued Offices of Inspectors General (OIG), jurisdictions without OIGs, international OIGs, and calculating return on investment of OIGs.

Frank joined the AIG in 2012 and since then earned his MPA and PhD. He now teaches public administration graduate courses on economics, research methods, inspection and oversight, and technology applications.


– Membership Liaison




– Bookkeeper




– IT & Program Analyst