Ioannis Milionis

Staff Lawyer

Ioannis is a Greek qualified lawyer. He has a law degree from the National and Kapodistrian University of Athens, Greece. He also holds an LL.M. degree in international law from Leiden University, Netherlands. As a student, he participated in the International Foreign Direct Investment Arbitration and Jessup Moot Courts, achieving 3rd and 11th place respectively with his teams. His area of expertise is international investment and commercial arbitration.

Prior to joining Volterra Fietta, Ioannis completed his traineeship with a top-tier Latin American firm specialising in investor-State and commercial arbitration. He has experience in disputes involving private and State-owned entities in the distribution, energy and pharmaceutical sectors. He has advised companies as well as sovereign States on substantive and procedural arbitration matters. Additionally, he has completed an internship with ICPO-INTERPOL.

He has also served as research assistant to Dr Victor Tsilonis, the 2020 Greek judicial nominee for the elections of the International Criminal Court. Finally, he has been a legal researcher for both the British Institute of International and Comparative Law, and Leiden University Prof Niels Blokker.


LL.M. in International Law, Leiden University, Netherlands

LL.B in Greek and European Law, National and Kapodistrian University of Athens, Greece



Greek, English, Spanish and French

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