Prior to this, he worked at the French Ministry of Foreign Affairs as Director for the United Nations between 2014 and 2017, and before that as France's ambassador to Sweden beginning in 2011.

[5] From 2002 to 2006, he was the deputy director of the United Nations and International Organizations Division of the France's Ministry of Foreign Affairs.

[7][6] Between 7 July 2014[8] and 2017, he worked at the Ministry of Foreign Affairs in France, as the Director for United Nations, International Organisations, Human Rights and Francophonie.

[9] On 14 February 2017, it was announced that he was appointed by United Nations (UN) Secretary-General Antonio Guterres as the Under-Secretary-General for Peace Operations.

[11] In particular, he took office during conflicts in Mali, South Sudan, and the Democratic Republic of the Congo.