ERIC O’NEILL is the author of Gray Day: My Undercover Mission to Expose America's First Cyber Spy (Crown). O'Neill is a cybersecurity expert and former FBI counterterrorism and counterintelligence operative. He is the founder of the Georgetown Group, the premier investigative and security services firm; serves as national security strategist for Carbon Black; and is the General Counsel for Global Communities, an international charity. He lectures internationally about espionage and national security, cybersecurity, hacking and fraud, and corporate diligence and defense, and has appeared as a national security expert on CNN and Fox. His writing has appeared in the Boston Globe, The Hill, TechCrunch, and Mashable. O’Neill is a graduate of Auburn University and the George Washington University School of Law.