Mike Lefebvre is an experienced cybersecurity professional currently serving as Senior Director of Security Development and Operations at Ryan since December 2025. Previous positions include Director of Cybersecurity at SEI (March 2022 - October 2025), Associate Director of Incident Response at Protiviti (February 2019 - March 2022), and Manager of Incident Response at Deloitte (January 2016 - January 2019). Additionally, Mike has academic experience as an Adjunct Lecturer at Southern Methodist University (August 2016 - December 2018) and as an Adjunct Professor at George Mason University (January 2011 - May 2014). Earlier career roles include Manager of Counter Threat Operations and Cyber Threat Intelligence Operations Lead at Armor Defense, Associate Manager of Cybersecurity R&D at Accenture, and Cyber Architect at Northrop Grumman. Mike is currently pursuing a PhD in Computer Science at Southern Methodist University, holding a Master of Science from Georgetown University and a Bachelor of Arts from the University of Virginia.
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