Idris Fassassi is a professor of law at University Paris-Panthéon-Assas, where he heads the Center for Comparative Public Law. He is the co-head of the comparative public law master’s degree and the LL.M. in European Law.

He teaches courses and has published in the fields of constitutional law, comparative constitutional law, international human rights law and international criminal law.
Fassassi is also a judge on the French National Court of Asylum, where he was appointed by the Office of the U.N. High Commissioner for Refugees.

His Ph.D. dissertation dealing with the legitimacy of judicial review in the United States won several national prizes and was published in 2017. He recently co-authored Droit des libertés fondamentales (Fundamental Rights Law, 2024) and Introduction au droit public (Introduction to Public Law, 2022).
Fassassi earned his Bachelor of Law, his master’s degree in public law and his Ph.D. in public law, summa cum laude, from Aix-Marseille University. He obtained an LL.M. from Harvard Law School, where he was an Arthur Sachs Scholar, and is a member of the New York bar.

He was awarded the Louis Favoreu Prize for the best paper written by a young author at the triennial French Congress of Constitutional Law.
Fassassi was a visiting scholar at New York University School of Law and a Fulbright Scholar. He has been a visiting professor at University of Virginia School of Law and a Distinguished Senior Research Fellow in the Constitutional Studies Program at the University of Texas at Austin.
He previously interned at the French Constitutional Court (Conseil constitutionnel) and worked as an associate human rights officer at the Office of the U.N. High Commissioner for Human Rights in Geneva.
Fassassi is a board member of the French Association of Constitutional Law.