Julia Tréhu is a Paris-based program manager and fellow with GMF Technology. Her focus is on US and European digital and technology policy, including technology-related trade and investment policy, platform regulation, data governance, and artificial intelligence. Tréhu holds master’s degrees in international political economy from the London School of Economics and in international security from Sciences Po Paris, and a bachelor’s degree in history from Princeton University.
Transatlantic Relations
James (J.D.) Bindenagel is a former Visiting Distinguished Fellow at GMF.
Sophie Arts leads GMF’s research and programming on Arctic security and geopolitics, and on North American and Nordic defense against conventional and hybrid threats. As a Washington, DC-based fellow within the Transatlantic Security program, she also works on North American continental and US homeland defense, allied cooperation in NATO and other formats, and Russian and Chinese strategic objectives and activities in the Arctic and adjacent theaters.
Arts joined GMF’s security and defense policy team in 2017. Previously, she worked at the Atlantic Council, GMF Brussels, Spiegel Online International, and Kantar Media. Her prior research covered NATO’s partnerships and flexible formats, the impact of emerging technologies on allied defense and deterrence, the dynamics of escalation within the cyber domain, and strategic stability in a multipolar world.
Her writings and commentaries are featured regularly in defense publications and international media. She is a member of The European Centre of Excellence for Countering Hybrid Threats’ pool of experts. In 2025, she served as co-chair of the task force for global peace and security for the Think7, the official G7 group that brings together the world’s leading think tanks and research centers.
Arts holds a master’s degree from Humboldt University in Berlin and a bachelor’s degree from the University of Freiburg.
Emiliano Alessandri is a visiting senior fellow at GMF. He is also a senior adviser with the Agency for Peace Building and an associate fellow with the Middle East Institute. His expertise is in the field of international security and multilateral cooperation with a particular focus on transatlantic relations, European affairs, and the Mediterranean/Middle East North Africa.
Alessandri was a resident senior transatlantic fellow with GMF between 2010 and 2013, working primarily on Mediterranean affairs and Türkiye. He subsequently served three successive secretary generals of the Organization for Security and Co-operation in Europe as a senior officer between 2013 and 2023. He also held positions with the International Center for Migration Policy Development, the Brookings Institution, and the Institute of International Affairs of Rome, and taught at the College of Europe and Central European University.
Alessandri holds a PhD in international history from the University of Cambridge and a master’s degree in international economics and US foreign policy from the Johns Hopkins University School of Advanced International Studies (SAIS).
Kristina Kausch is deputy managing director of GMF’s South and Wider Europe program, dividing her time between Madrid and Brussels. An established voice on European foreign affairs and Europe’s relations with its neighborhood, she conducts research on a broad interdisciplinary portfolio that includes international security, connectivity, the geopolitics of technology, and global power shifts.
Prior to joining GMF, Kausch held positions with the Carnegie Endowment for International Peace; FRIDE, a Spanish think tank; the Bertelsmann Stiftung; and GIZ, the German development cooperation agency. She has contributed to a wide range of media outlets including The New York Times, the Financial Times, The Guardian, Politico, El País, RTVE, Defense One, Deutsche Welle, ARD, Der Tagesspiegel, and Süddeutsche Zeitung.
Olena Prokopenko is a senior fellow at GMF. She formerly managed Eastern Neighborhood programs at the European Endowment for Democracy in Brussels and served as a development adviser at the Danish embassy in Kyiv.
Prokopenko previously chaired international relations at RPR Coalition, Ukraine’s largest civil society platform, and advised Ukraine’s finance minister on donor relations. She served as a civil society expert for the UN Development Programme and the Council of Europe, and worked as a government relations manager at Hill+Knowlton Strategies.
Prokopenko is a co-founder of the Transatlantic Task Force for Ukraine and a government relations trainer at the Kyiv School of Economics. Her analysis of Russia’s war in Ukraine and Ukraine’s reform progress is regularly featured intop international media, including the BBC, Bloomberg, MSNBC, Al Jazeera, TIME magazine, Newsweek, and Le Monde.
Prokopenko is a lawyer by training and an alumna of the US State Department’s Edmund S. Muskie Graduate Fellowship Program. She holds a master’s degree in political science from Western Illinois University.