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John Gelinne

Managing Director | Deloitte & Touche LLP | Cyber Wargaming leader

John, a managing director at Deloitte & Touche LLP, is a part of the Cyber Risk Services Strategy practice of Deloitte Risk & Financial Advisory. He helps clients prepare for, respond to, and recover from cyber incidents, and is responsible for Deloitte’s commercial cyber risk quantification, cyber wargaming, and technical resilience services that enable organizations to plan, adapt, and respond to dynamic changes, disruptions, or threats. John joined Deloitte after retiring from the US Navy. In the Navy, he held afloat command at various levels. He served on the Joint Staff, Office of the Chief Information Officer (CIO), where he was responsible for the continuity of information technology operations for the National Military Command Center prior to and during the 9/11 attack on the Pentagon. John’s last tour in the Navy was Chief of Staff, Fleet Cyber Command/10th Fleet, where he was third in command of the Navy’s cyber operations. John has been published in US Naval Institute Proceedings, Deloitte Review, Dark Reading and the Wall Street Journal’s CIO and CFO Journals on topics ranging from building resilience to cyber risk quantification. He was co-author of Deloitte’s “Beneath the surface of a cyberattack,” a study that describes the hidden costs associated with a cyber breach. John also recently co-authored an update to this original study “Beneath the surface of a cyberattack: Collision avoidance,” where he describes the business application of cyber risk quantification to mitigate cyber risk. John holds advanced degrees in Information Systems Management and National Security and has an undergraduate degree in Engineering from the United States Naval Academy.