The CIG Experts

When you engage with the Cyber Initiatives Group community, you're talking with individuals who include the experts below.

Public & Private

Our experts come from diverse backgrounds rooted in the public and private sectors.

The Experts


Matt Hayden​

Assistant Secretary for Cyber, Infrastructure, Risk and Resilience Policy, DHS

Matt Hayden served as the Assistant Secretary for Cyber, Infrastructure, Risk and Resilience Policy at DHS where he was responsible for leading policy development in support of department-wide efforts to reduce national risks with a focus on critical infrastructure cybersecurity, federal network security, countering cyber-crime, and improving the security and resilience of the global cyber ecosystem, as well as national resilience initiatives that enhance Federal, State, and local government and community preparedness and response capabilities. Additionally, he served as an expert advisor on Cyber, Infrastructure, Risk and Resilience matters to the Under Secretary, Secretary, and other high-level officials.
Mr. Hayden previously was the Senior Advisor to the Director of the Cybersecurity and Infrastructure Security Agency, and Deputy Assistant Secretary for the Private Sector within the Office of Partnership and Engagement at DHS. 
Prior to joining, he was a senior executive with the National Disability Rights Network focusing on the use of technology and modernization for the national membership.


Deborah Plunkett

Former Director of Information Assurance, NSA

Debora Plunkett is a cybersecurity leader with over 30 years of experience. A former Director of Information Assurance at the National Security Agency, she is currently Principal of Plunkett Associates LLC, a consulting business. She is a Senior Fellow at Harvard and a Professor at the University of Maryland University College. Plunkett is a Director on JCPenney’s Corporate Board, a member of the Strategic Advisory Board of Raytheon Integrated Defense Systems and the Advisory Board of the International Consortium for Minority Cybersecurity Professionals. She was on the National Security Council at the White House in two administrations. Plunkett earned an undergraduate degree from Towson University, an MBA from Johns Hopkins University, and an MS from the National War College.


Vince Stewart

Former Director of the Defense Intelligence Agency

Lieutenant General Vincent Stewart (Vince) is the Founder and CEO of Stewart Global Solutions, LLC, an international consulting organization. He retired from the U.S. Marine Corps after more than 38 years of active commissioned service to the nation. On his final tour of duty, he served as the Deputy Commander United States Cyber Command, one of the 11 Combatant Commands of the Department of Defense with military and civilian personnel stationed worldwide. Prior to that assignment, he served as the 20th Director of the Defense Intelligence Agency (DIA), culminating an intelligence career by overseeing the global defense intelligence enterprise supporting customers from the President of the United States, to the troops deployed around the world. In his other General Officer assignments, he served as the Commander for Marine Corps Forces Cyberspace Command and as the Director of Intelligence for the U.S. Marine Corps.


Gilman Louie

CEO and Chairman of LookingGlass Cyber Solutions

Gilman Louie is the Chief Executive Officer and Chairman of LookingGlass Cyber Solutions and a founding partner at Alsop Louie Partners. He is also the Chairman of the Federation of American Scientists and a director at the Markle Foundation. He founded and formerly led In-Q-Tel, a strategic venture fund created to help enhance national security by connecting the Central Intelligence Agency and U.S. Intelligence community with venture-backed entrepreneurial companies.

Glenn Gerstell bw.jpg

Glenn Gerstell

Former General Counsel, National Security Agency

Glenn S. Gerstell, a Senior Adviser at the Center for Strategic & International Studies, served as the General Counsel of the National Security Agency and Central Security Service from 2015 to 2020. He has written and spoken widely about the intersections of technology and national security and privacy.

Prior to joining NSA, Mr. Gerstell practiced law for almost 40 years at the international law firm of Milbank, LLP, where he focused on the global telecommunications industry and served as the managing partner of the firm’s Washington, D.C., Singapore, and Hong Kong offices.

Mr. Gerstell served on the President’s National Infrastructure Advisory Council, which reports to the President and the Secretary of Homeland Security on security threats to the nation’s infrastructure, as well as on the District of Columbia Homeland Security Commission.