Dr. Michael Gelles
Managing Director, Deloitte Consulting LLP
Dr. Michael G. Gelles, managing director with Deloitte Consulting LLP, advising a wide variety
of clients in the public and private sector. Dr. Gelles is a known insider threat specialist focused
on cyber and physical security risks, asset loss, exploitation, terrorism workplace violence and
sabotage. Dr. Gelles works to improve their insider threat posture with a specific emphasis on
people, mission and risk. Dr. Gelles has led the development of over 70 insider threat programs
including Deloitte’s own program that entails a number of proprietary innovative solutions. Dr.
Gelles’ approach to insider threat is data driven with large security transformations based on the
client’s strategy, operations, workforce and broader culture focused on mitigating enterprise risk.
He is an author of two books as well as numerous articles and is a frequent guest speaker. His
books include: “Threat Assessment a Risk Managed Approach” (Taylor Francis) and recently
released Insider Threat; Prevention, Detection, Mitigation and Deterrence (Elsevier Press).
Most recently, a book chapter on insider threat program development in the International
Handbook of Threat Assessment edited by Reid Meloy and Jens Hoffmann published (Oxford
Press). Before joining Deloitte, Dr. Gelles spent 20 years with the Navy and the Naval Criminal