• JEF is a supranational, politically pluralist youth NGO with about 30,000 members in over 30 countries. The goal of JEF is the creation of a democratic European federation as a guarantee for peace and more free, just and democratic society.

Meet the European Secretariat!

Valentin Dupouey-Sterdyniak - Secretary General

Valentin was born in Nancy (France) and, as an Erasmus Generation member, has lived, studied, volunteered and work in the UK, Slovenia and Denmark before settling to Belgium. He completed a Masters Degree in Sports Management, focusing on EU Sports Policy. He has worked and volunteered in various NGOs in the field of sport, youth and learning mobility for the past 7 years. Besides his work at JEF Europe, he's volunteering for the Erasmus Student Network and the European Youth Forum. In his spare time, he plays badminton intensively and shares some thoughts on his blog.

He's been appointed as new Secretary General of JEF Europe in April 2016. During the next two years, his main objective will be to strengthen JEF Europe and its sections throughout Europe, to help them develop to ensure JEF's political impact grows even stronger at all levels. 

He is in charge of the daily leadership and management of the organisation and the staff team based in Brussels. 


Contact Valentin


Marine Betrancourt - Communication & Project Officer

Marine is from Lyon (France) where she studied political sciences and public law. True European, she interned Monash Europe & EU Centre at Monash University in Melbourne for a better taste of Europe from down under and has been involved for years within AEGEE/ European Students’ Forum, as well as various European youth projects. She has also been part of two youth-led webmedia.

She further developed a strong interest in gender equality and digital stakes as part of different media and youth activism initiatives.

Contact Marine


Zoey Stambolliu - European Voluntary Service

Zoey is coming from Athens of Greece. A genuine supporter of the idea of a European Federation, she has been involved in JEF for 5 years now. She holds a Masters degree of European Political and Administrative Studies from the College of Europe. Her field of interest is EU migration policy. She has volunteered with various NGOs in refugee camps in Greece while during her studies she focused her research on the reform of the Dublin System. Her Erasmus experience but also her internships for the EU Delegation in Tirana and different national institutions have reinforced her support for the creation of an EU Federation.

As European Voluntary Service she will be supporting the implementation of Europe at School activities in Belgium and all across Europe.

Contact Zoey


Casey McKenzie - Policy and Project Assistant Intern

Casey coming from Chicago, Illinois and has been living in Europe for the past four years. Casey identifies himself as a world citizen and through his time living on the continent has come to understand the importance of a United Europe.

Casey holds a Masters degree in International Relations and European Studies and is currently pursuing a second degree in EU Public Policy. Having just recently completed a traineeship at European parliament, he is looking forward to applying what he has learned to the benefit of JEF.

During his internship with JEF, he will support the Secretariat in particular with regards to its policy-related work, help with the implementation of JEF projects, as well as support the office in its daily tasks.

Contact Casey


Carles Masachs, Project assistant

Carles is a brand-new JEFer coming from Barcelona (Spain) and, as a Catalan, he feels deeply European. After some experience at local youth-wing platform and university associations, he has gained awareness about the wide range of possibilities offered by the EU. He holds a degree in Geography and Regional Planning by the University of Barcelona, and his field of interest is political geography, geopolitics and international relations.

Currently, he is Project Assistant thanks to a Eurodissey internship.

Contact Carles

Activity Report

40 years of JEF

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