Leadership Team

With over 25 years of executive federal government and commercial experience at both public and private companies, Mr. Taddeo is AppGate’s Chief Executive Officer and President. He previously served as AppGate’s CISO, directing global security operations, crisis management and business continuity processes, and oversaw AppGate’s federal government business, working closely with sales and technical leadership to define and deliver Zero Trust solutions to meet the needs of AppGate’s public sector customers.

Previously, Mr. Taddeo was the CISO and President of Cyxtera Federal Group. He is the former Special Agent in Charge of the Special Operations/Cyber Division of the FBI’s New 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. Previous responsibilities focused on FBI international operations, including service as a Section Chief in the International Operations Division, where he managed operations in Africa, Asia and the Middle East.

Mr. Taddeo received a B.S. in Applied Physics from Rensselaer Polytechnic Institute. After completing his studies, Taddeo served as a tank officer in the U.S. Marine Corps. In 1994 he earned a J.D. from St. John’s University. Upon graduation, he joined the law firm of Mound Cotton Wollan & Greengrass LLP in New York, where he practiced in the field of civil litigation until entering on duty with the FBI. Mr. Taddeo is a member of the New York State Bar and a graduate of the CISO Executive Program at Carnegie Mellon University.

With over 20 years of engineering expertise, Nitin has a proven track record in driving technical innovation. He held pivotal roles at industry leaders like Microsoft, where he developed anti-spam engines for Exchange and Outlook and led significant security projects, including building a real-time intrusion detection pipeline for the U.S. Department of Defense’s $10B JEDI contract. At Dataminr, he led the Core Platforms Engineering Division, helping scale the AI platform that identifies emerging risks from publicly available information. Most recently, as VP/Head of Engineering at Blackbird.AI, he played a key role in advancing their Generative AI platform to combat mis/disinformation and deep fakes. 

Nitin also advises early-stage startups on AI and cybersecurity, offering valuable expertise as a Technical Advisor and Subject Matter Expert. He holds dual master’s degrees in Electrical and Computer Engineering from Stony Brook University and Data Science & Machine Learning from UC Berkeley.

Previously, Mr. Dale was Associate General Counsel of Cyxtera Technologies, Inc., AppGate’s former parent company, from May 2017 to January 2020, and Associate General Counsel of 3Cinteractive from July 2014 to April 2017. Prior to that, Mr. Dale was a corporate and securities associate at Greenberg Traurig, LLP from September 2010 to June 2014. He received his B.S. in Finance, B.A. in Economics, and M.S. in Finance from the University of Florida, and his Juris Doctorate from the University of Virginia.

Eyal brings more than 20 years of finance leadership experience in cybersecurity and fintech, with a track record of driving operational excellence and scalable growth. At AppGate, he leads financial strategy, planning, and performance management, aligning finance with business objectives. Previously, Eyal held senior finance roles at Confetti, Deep Instinct, American Express, and Deloitte, guiding financial operations through periods of rapid expansion and transformation. His expertise spans strategic planning, M&A, and go-to-market enablement.

Eyal holds a BA in Accounting and Finance and an MA in Political Science from Tel Aviv University.

Paul originally joined Cryptzone, the pre-cursor to AppGate, in 2016 to build and lead global marketing prior to the creation of Cyxtera in 2017. At Cyxtera, he then held the position of Senior Vice President of Corporate Marketing. Prior to rejoining AppGate in 2024, Paul served in senior marketing roles at companies including Zededa, LoginVSI, Mendix and Precise Software. Paul holds a BS and an MBA from Bentley University.

Al is a security leader and practitioner with more than 20 years of experience in cybersecurity and engineering. Before joining AppGate, he spent 12 years as Head of Information Security at Magnetar Capital, where he led security engineering and operations, attack surface reduction, identity and incident response in a hybrid environment subject to Securities and Exchange Commission regulatory requirements. Having deployed Zero Trust architectures at scale, Al brings a practitioner’s perspective as he leads AppGate’s channel strategy and strategic partnerships.

Sandra is a senior technology executive with over 40 years of experience across Leidos, SAIC, Engility, AT&T, and Telcordia Technologies, leading global organizations that support the U.S. Government, defense agencies and critical infrastructure providers in highly secure, mission-critical environments. She specializes in building and scaling professional services organizations that accelerate adoption of modern cybersecurity and Zero Trust architectures.