Christopher Day leads ManTech’s research and development efforts in next-generation cybersecurity solutions. He also explores how emerging technologies such as 5G, the Internet of Things and edge computing affect cybersecurity and how to build solutions with those technologies in a secure way. Before joining ManTech, Mr. Day was Chief Cybersecurity Officer for AppGate, a leading Zero Trust and cybersecurity products and services company. He was responsible for the vulnerability research, exploit development and cybersecurity services lines of business. Before AppGate was spun out of Cyxtera Technologies, a global security-as-a-service and data center infrastructure provider, he served as Chief Cybersecurity Officer responsible for cybersecurity strategy, R&D and customer-facing operations. Prior to Cyxtera, Mr. Day was Chief Information Security Officer (CISO) for Invincea, Inc., a next-generation endpoint security and anti-malware software company acquired by Sophos, Ltd in 2017. Previous to Invincea, he was Chief Technology Officer (CTO) for Packet Forensics, LLC and its subsidiaries, which provide advanced cyber security products and large-scale threat and commercial intelligence services for government and the private sector. Mr. Day has also been with Terremark Worldwide, Inc., as Senior Vice President, Secure
Information Services, where he started the information security practice, including a professional services group and a managed security services operations center and eventually assumed the role of Chief Security Architect.
In 2013, Christopher was appointed to the Defense Science Board (DSB), which provides guidance to the Secretary of Defense and other Defense Department leaders on technical and strategic matters affecting national security. In 2019, Christopher was asked to co-chair the DSB’s task force exploring the impact of the Internet of Things on the Defense community.
Mr. Day graduated Magna Cum Laude from the University of Miami with a Bachelor of Science in physics and mathematics and is a member of Phi Beta Kappa. He is a Fellow of the American Academy of Forensics Science and has authored and co-authored four patents in the areas of Intrusion Detection (#7017186), Wireless Network Security (#7020476), Information Security Auditing and Incident Investigation (#8572744), and Reconfigurable Virtualized Remote Computer Security System (#8931087), respectively.