Marc Perrin de Brichaumbaut

Marc Perrin de Brichaumbaut is a French career diplomat, former Judge at the International Criminal Court and former Secretary-General of the OSCE.

From 2015 until 2024, he was Judge at the International Criminal Court. During this period, he served six years in Pre-Trial Chamber II, examining and deciding upon the request of the Office of the Prosecutor for arrest warrants and Declarations for the Confirmation of Charges. Judge Perrin de Brichaumbaut presided over Trial-Chamber II, which in 2017 awarded compensation to individual victims of war crimes for the first time, setting a precedent in this field. He served as Second-Vice-President of the Court from 2018 until 2021. 

Previously, Marc Perrin de Brichambaut was Secretary-General of the OSCE from 2005 until 2011. In this position, he provided political advice and support to the chairmanships of the Organization (Slovenia, Belgium, Spain, Finland, Greece, Kazakhstan and Lithuania). He was instrumental in the preparation of annual ministerial meetings, with a particular focus on the 2010 summit in Astana. He was an ardent proponent of the OSCE, engaging proactively with participating States, academic institutions, and the private sector to promote the Organization’s interests. 

Prior to being appointed as Secretary-General of the OSCE, Perrin de Brichambaut served in numerous senior positions at the French Ministry of Foregin Affairs and the Ministry of Defence. As Legal Advsior to the Foreign Ministry, he led the French delegation to the Rome Conference and signed the Rome Statute on behalf of France. In his capacity as Ambassador of France to the Vienna Negotiations on Arms Control and Confidence-Building (Conference on Security and Co-operation in Europe), he negotiated the first revision of the Treaty on Conventional Forces in Europe and the Open Skies Treaty. 

Prior career paths include the active service at the French “Conseil d’Etat” (Supreme Court for judicial rewiew). He was appointed Conseiller d'Etat in 1992. He graduated from the Ecole Normale Supérieure de Saint-Cloud and the Ecole Nationale d'Administration.

Marc Perrin de Brichambaut was appointed as conciliator of the OSCE Court of Conciliation and Arbitration in September 2025 and was subsequently elected as a member of the Court’s Bureau.