Security and Geopolitics
Joshua Stone is a senior program coordinator for the GMF Indo-Pacific Program. Based in Washington, his portfolio encompasses Japan, Korea, and Taiwan. He manages the Japan Trilateral Forum, Korea Trilateral Forum, and the Taiwan-US Policy Program, among other programs and projects.
Prior to joining GMF, Joshua worked as a senior researcher at the defense section of the Embassy of Japan in the United States, supporting US-Japan defense coordination and cooperation. Previously, he worked as an open-source intelligence analyst contracted with the US Department of Defense and as a program coordinator with the Japan Desk at the Department of State. In 2023, he was a nuclear public policy fellow with the Nonproliferation Policy Education Center.
Joshua received his bachelor's degree from the University of Virginia and has studied abroad at Yonsei University and Doshisha University. He is a heritage Korean speaker, fluent in Japanese, and a student of Mandarin Chinese.
Sophie Arts is a fellow with GMF’s Geostrategy North team, where she leads the workstream’s research on Arctic security and geopolitics. As part of her portfolio, she covers Nordic security, North American homeland defense, and regional cooperation with allies and partners.
In 2017, Arts joined GMF's Washington, DC-based security and defense policy team, focusing on transatlantic security within and outside NATO. Her prior research covered the alliance’s partnerships and flexible formats, the impact of emerging technologies on NATO defense and deterrence, the dynamics of escalation within the cyber domain, and strategic stability in a multipolar world.
Arts previously worked as a research assistant at the Atlantic Council and as a trainee in GMF’s Brussels office. She has a background in political journalism, writing for Spiegel Online International and Kantar Media. Originally from Germany, she holds a master’s degree from Humboldt University in Berlin and a bachelor’s degree from the University of Freiburg. She spent two years studying in the United States, at Connecticut College and at the University of Virginia, where she also worked as a research assistant in the media studies department and in the university’s Center for Politics, supporting Larry J. Sabato's work on "The Kennedy Half-Century".
Marta Prochwicz-Jazowska is a program manager in the Warsaw office. She is responsible for coordinating and managing various German Marshall Fund activities in Warsaw. She closely monitors and writes on issues related to Polish foreign policy with an emphasis on Poland’s role in Europe, in the war in Ukraine and Polish-American relations. Before joining GMF, on behalf of the Polish government, Prochwicz-Jazowska worked with American universities (such as Yale, Harvard, UCLA) on cultural exchange programs. Previously, she worked for the Polish Permanent Representation to the EU. She also gained experience at the EU Commission, the EU Delegation to Peru, and NATO. Prochwicz-Jazowska holds a master’s degree in international studies and diplomacy from the School of Oriental and African Studies and a B.A. from University College London. She grew up in Canada, Poland, and Austria and has a French education.
Özgür Ünlühisarcıklı is the regional director, Türkiye. Prior to joining GMF, he was the manager of the Resource Development Department of the Educational Volunteers Foundation of Turkey. Previously, Ünlühisarcıklı served as director of the ARI Movement, a Turkish NGO promoting participatory democracy, and as a consultant at AB Consulting and Investment Services.
Ünlühisarcıklı is an expert on transatlantic relations and Turkish foreign policy, domestic politics, democratization, and civil society. He is quoted frequently in international media including The New York Times, The Economist, The Wall Street Journal, Bloomberg, Financial Times, Deutsche Welle, and the BBC.
After graduating from the Robert College (Istanbul), Ünlühisarcıklı received his bachelor's degree in business administration from Marmara University and his master's degree from Koç University. He speaks fluent English in addition to his native Turkish.
Kristine Berzina is the Washington, DC-based managing director of GMF Geostrategy North. She is responsible for leading programming on US, Nordic, Baltic, and Arctic security and defense issues, and provides analysis on NATO and US and European foreign policy.
Berzina also leads GMF’s Across America initiative, which takes European officials into the US heartland to build regional connections on security issues. She is a frequent commentator in international media, including The New York Times, the BBC, CNN, NPR, France 24, Deutsche Welle, and The New Yorker. She is a co-host of Drošinātājs (The Fuse), a Ukraine-focused podcast and Latvian radio program.
Berzina previously worked on countering autocratic influence as head of GMF’s Alliance for Securing Democracy’s geopolitics team and, while based in Brussels and Berlin for the organization, on transatlantic security and energy issues. She holds a bachelor’s degree in political science and history from Yale University and a master’s degree in international relations from the University of Cambridge.
Kristina Kausch is deputy managing director and senior fellow, GMF South. She is also GMF’s representative in Madrid. Her research focuses on Europe’s relations with its neighborhood and broader geopolitical trends in the Middle East.
Prior to joining GMF, she held positions with the Carnegie Endowment for International Peace, the Spanish think tank FRIDE, the Bertelsmann Foundation, and the German development cooperation agency GIZ. She has provided articles and commentary to a range of outlets including The New York Times, the Financial Times, The Guardian, Politico, El País, Middle East Eye, Tagesspiegel, and Süddeutsche Zeitung.