The International Office of the European Student Think Tank is the body with representation from ambassadors in EU member states. The International Office oversees our team of Ambassadors. The EST Ambas­sad­ors are the link between the EST and the EU’s mem­ber states and offi­cial can­did­ate mem­ber states. They rep­res­ent the EST, pro­mote and organ­ize events loc­ally, write blogs about their country and make sure our net­work is as big as pos­sible.

To contact our International Office, please send an email to:

Equal Opportunities:

The EST Board has an equal policy representation for Ambassadors, with 50% women and 50% men in our International Office. The EST Board of 2016 has committed to the progressive implementation of equality quotas in our organization beginning September 5th 2016, and committing to achieve a 50/50 representation by the first day of 2017.

International Officer – Eleanna Giakoumi

Eleanna is an LLB Law graduate from the University of Bristol and will be graduating from her Master’s degree in Political Economy from the University of Manchester in September 2023. Her specialization in her current degree is in the Political Economy of Business, Finance and Employment. From September 2023 onwards, she will be based in Brussels, as she has accepted a traineeship position at the European Committee of the Regions. She has previously held research and leadership positions at the University of Bristol, law firms and think tanks. She is passionate about European affairs and hopes to help shape the future of European public policy one step at a time, first by connecting the EU with its students.

Contact her via Linkedin.

International Officer – Joan Subirachs

Joan graduated with a BA in Global Studies from Pompeu Fabra University (BCN, Spain) in 2023, focusing on Euro-Atlantic relations, Security and Defence, and Intelligence. He also studied at Dalhousie University (HFX, Canada) as an exchange student.

Joan has worked in and collaborated with several pro-European initiatives both in the public and private sectors, including at the Ministry of Foreign Affairs of Catalonia, the Center for European Documentation in the Autonomous University of Barcelona, the Catalunya Europa Foundation, and now at the EST.

During his experiences, he has been involved in projects related to International Security, Public Policy, European Affairs, and the promotion of human rights and democracy. He has also a wide interest in languages, speaking fluently English, Spanish, Catalan, and French.

Contact her via Linkedin

International Officer – Mariami Aliashvili

I am currently in my final year pursuing a Bachelor’s degree in International Relations at Tbilisi State University in Georgia. During high school, I received a scholarship from the U.S. Department of State to participate in the FLEX exchange program in the United States. Since then, my involvement with non-governmental organizations has provided me with valuable knowledge and experience in planning and executing youth-oriented projects. Furthermore, I attended Tallinn University’s summer school with funding from the Estonian government and learned about the role of small states in international law. Most recently, I have completed my exchange semester in Germany. All of the aforementioned experiences have shaped my professional aspirations in relation to the European Union and my country’s Western integration.

Contact her via Linkedin.

International Officer – Catarina Vita

Hello! My name is Catarina Vita and I’m an undergraduate student at Sciences Po Paris. I come from Brazil and major in Politics and Government, with a minor in International Trade and Finance. I am very interested in Global Politics, diplomacy, international economy and security, and I hope to hone all of these interests into my role as an International Officer. My hobbies outside academics are running, singing, and being with my friends and loved ones.

Contact her via Linkedin.

International Officer – Gurgen Petrosyan

My name is Gurgen but better George and I’m from Italy, Genova. I am interested in working with Climate change, Climate Justice and LGBTQIA rights protection. I am passionate about plants, nature, planting, pets, detective movies, cooking and currently I am Climate Pact Ambassador, Secretary General of Aiesec Global and Digital Citizen Ambassador.

Contact her via Linkedin.



Highlights from Our Ambassadors:

In 2016, Austrian Ambassador to the EST Johannes Tropper organized a delegation visit to the OPEC and the UN. The Dutch Ambassador to the EST Hester Mennes lead a policy working group on the European migrant crisis with the collaboration of Job Cohen, former mayor of Amsterdam, and Professor Hein de Haas, former co-director of Oxford’s International Migration Institute. Irish Ambassador to the EST Jason Deegan, and President of the INGO Anti Corruption International, coordinated and invited the European Student Think Tank to Participate on Anti Corruption International’s “Clean Vote” project founded in Oslo, Norway. The project campaigns for voting transparency and clean elections, through the monitoring of electoral corruption.

For any ques­tions or com­ments please send an email to


What Becoming an Ambassador to the EST has meant:

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“Being an EST Ambassador was a unique experience. It was a perfect chance to engage in an international discussion about the most vital issues in the current international affairs. Being heard and let others to be heard allows to shape the reality, which is one of the greatest values”. – Kinga Jaromin – former Polish Ambassador to the EST


“The best part of being an Ambassador for the EST is knowing that you are always backed by a group of students that are as interested as you in making Europe a better place for everyone”. – Daniel Rubio Sanchez – former Spanish Ambassador to the EST