Appgate announced that its board of directors has appointed Leo Taddeo as the company's new Chief Executive Officer, effective January 4, 2023. With 25 years of executive federal and commercial experience, Taddeo had been serving as Appgate's Chief Information Security Officer (CISO) and head of its Federal and Threat Advisory divisions. Prior to joining Appgate, Taddeo was the CISO and President of Cyxtera Federal Group.

He was the former Special Agent in Charge of the Special Operations/Cyber Division of the FBI'sNew York Office. In this role, he directed over 400 special agents and professional support personnel conducting cyber investigations, surveillance operations, information technology support and crisis management. Taddeo received a B.S. in Applied Physics in 1987 from Rensselaer Polytechnic Institute.

He then served as a tank officer in the U.S. Marine Corps. Following this service, Taddeo earned a J.D. from St. John's University.

Taddeo is also a graduate of the CISO Executive Program at Carnegie Mellon University.