Endy D. Zemenides, Executive Director

Prior to joining HALC, Endy spent over a decade at the intersection of policy and politics. He practiced law in Chicago, specializing in municipal law and government relations. He served as Senior Advisor for Illinois State Treasurer and Democratic candidate for Senate Alexi Giannoulias. Endy serves as a Nonresident Fellow at the Chicago Council on Global Affairs, where he had previously been an Emerging Leaders Fellow. Endy's policy experience also includes participation in the Aspen Institute's Socrates program, service on the editorial board and board of advisors of the National Strategy Forum, and lecturing in international relations and American foreign policy in DePaul University’s political science department. Endy presently serves on the Board of Directors for College Year in Athens, and on the University of Chicago Booth School of Business’ Civic Scholars Program Advisory Committee. He received a BA from DePaul University, an MA from the University of Essex (UK), and his JD from the Georgetown University Law Center, where he was also a fellow in the Harrison Institute for Public Law and an editor of the Georgetown Journal of International Law.

Georgia Logothetis, Managing Director

A former attorney and a seasoned communications strategist, Georgia has nearly 15 years of experience in politics and advocacy. She has run national & state advocacy campaigns, raised millions online in grassroots donations, created a comprehensive leadership training curriculum and has helped organize citizen lobbying in Washington, DC. She has been profiled in the Chicago Reader by Chris Hayes and her work has been cited in The Washington PostThe New York Times and other publications.

Thanos Davelis, Director of Public Affairs

Thanos joined the Hellenic American Leadership Council in 2016, and serves as the Director of Public Affairs. He previously spent time at the Consulate General of Greece in Chicago, serving as the point person on a number of issues, including those related to the Consulate’s responsibilities as EU local chair. He is also currently a member of HALC’s flagship Leadership 2030 program. Thanos holds a BA in History and International Studies from Loyola University Chicago. 



General (ret.) Taxiarchis Sardellis
Nonresident Senior Fellow for Defense and Security Policy

General (ret.) Taxiarchis Sardellis is an executive with extensive experience in Strategic International Relations and wide exposure in leveraging extensive networks of diplomatic defense and foreign partners. He is considered an exceptional problem-solver, demonstrating a unique combination of human resources motivation and project management skills.

During his 32 years of successful military career, he served in Special Operations units, Army General Staff positions, the Greek Ministry of Defense as Director of International Relations, NATO and US Army HQ’s and the Greek Embassy in Washington DC. Represented Greece’s national interests in multilateral meetings and deliberations on draft resolutions and reports, and other policies related to NATO, UN, OSCE guidance and international cooperation as well as international relations. Provided valuable insights and proposed policies and initiatives for defense and security to members of the U.S. Congress on Capitol Hill and major think-tanks, including the Council on Foreign Relations, Center for Transatlantic Relations (Johns Hopkins University), the Woodrow Wilson International Center for Scholars, Center for International and Strategic Studies, the Hudson Institute, Atlantic Institute and NESA. Provided tailored training for selected officers or cabinet members of various non-NATO countries including Switzerland, Romania, Ukraine, Albania, Armenia, Azerbaijan, aiming to develop military cooperation with these countries and to facilitate their accession and adjustment to NATO, build subject matter expertise on the reform and development of defense institutions, and recommended the organizational design (structure, job descriptions, staffing, design and implementation of SOP’s) for the Ministry of Defense of Montenegro, Serbia, Switzerland, and Armenia.

He holds a BA on Military Science and Operational Studies from the Greek Military Academy, and a Post Graduate Diploma on Defense Studies from the Greek Army Supreme College. He has graduated from the US Army Chemical Warfare Officer Program - Ft. McClellan, Alabama, the US Army Infantry Advanced Officer School - Ft. Benning, Georgia, has attended the Seminar on “21st Century Governance in an Era of New American Leadership” by the Kennedy School of Government, Harvard University - MA, multiple seminars on globalization, security challenges and risks, assessment of various geostrategic regions in the NATO Defense College as well as numerous professional development courses of the Greek Army and NATO.

He is a certified paratrooper, speaks fluent English and Italian, has lectured at Georgetown University, Center for Security Studies, on the Balkans, focusing on political and economic developments in the region, energy security, international relations and NATO enlargement and has been awarded several awards and distinctions by the President of the Hellenic Republic, the Greek Minister of Defense, the Belgian Army Parachutist Badge, the NATO non-article 5 Operations Medal, awarded by HE the Secretary General of NATO and the U.S Army Meritorious Service Medal, awarded by the Secretary and Chief of U.S Army

Board of Directors


Chairman - Alexi Giannoulias

Vice Chairman - George Tsunis

Ted Diamantis

Michael Dovellos


Anthony Kammas

Eleni delimpaltadaki Janis

Yianni Konstantinou

Vanessa Kamberis


Intern with HALC!

Contact us at for details on internship and fellowship opportunities.