[1] Régibeau started his diplomatic career in the Belgian Federal Public Service Foreign Affairs in 1998.

He returned to Brussels in 2003, where he served as head of the Private Office of the Minister of Defense until 2007.

In the same year, he was appointed Director General in charge of Multilateral Organizations at the Foreign Ministry where he led some aspects of the Belgian Presidency of the European Union in 2010.

[1] Following his service as Deputy Commissioner for the commemoration of World War I from 2012 to 2016, Régibeau started his role as ambassador to Armenia, Belarus, Uzbekistan and the Russian Federation.

[4] Since 2020, Régibeau has been the ambassador of Belgium to the United States of America.