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Leiden-Sarin Moot Court Team 2019

Das aktuelle Leiden-Sarin Moot Court Team 2019

v.l.n.r. Kerem Öntas, Leona Coloma Rebolledo, Lenart Osten


Kerem Öntas (21) was born in Aachen and graduated bilingually from the Couven-Gymnasium, in which the courses of geography, history and politics were entirely taught in English, in 2015. Since 2016, he studies law at the University of Cologne. Currently, he is enrolled in his sixth semester.

In his free time, Kerem volunteers for the German Red Cross by assisting senior citizens. In addition, he participates in the Refugee Law Clinic Cologne, a programme which provides legal support for migrants.

Kerem applied for the Sarin-Leiden Moot Court because of his interest in public international law and his enthusiasm to dwell upon the field of air law, which is barely dealt with during regular studies. Through the moot court experience, Kerem wants to expand his legal vocabulary and further strengthen his team-work skills.


Leona Coloma Rebolledo (23) was born in Wiesbaden and graduated from Internatsschule Schloss Hansenberg in 2013. She then moved to Cologne where she is currently studying law in her 9th semester at the University of Cologne. In 2016, she spent a semester abroad at the Autonomous University of Barcelona. During this time, she not only improved her Spanish skills, but was also able to gain knowledge of foreign legal systems. Leona already finished her state examination and is currently specializing in public international law and European law. By participating in the Sarin Moot Court, she hopes to deepen her knowledge of public international law and to gain an insight into Aviation Law, a field of law, which is given little attention in the course of regular studies. Furthermore, Leona is convinced that the Moot Court is a great opportunity to improve her English skills in terms of legal writing and speaking. She is looking forward to working in a team and to meeting new challenges together.


Lennart Osten (21) is currently in his 5th semester of studying law at the University of Cologne. He was born in Bergisch Gladbach, where he graduated from the Dietrich-Bonhoeffer Gymnasium in 2015. In 10th grade, he attended a boarding school in Boca Raton in the United States. After graduating, he spent half a year of social service (BFD) in a retirement home. As a participant of the Leiden-Sarin Moot Court, Lennart hopes to gain insights into the practical application of law beyond the academic setting and improve his rhetorical abilities. He looks forward to intense work with his team and to diving deeper into the field of public international law.


Das Team mit ihrem Coach Andrea Trimarchi