In 1944, after the liberation of Luxembourg, he became Minister for Education, Culture and Science under Pierre Dupong.
From 14 December 1945 to 15 July 1948 he was a member of the Council of State.
He returned to his post as Minister for Education, Culture and Science in the government of Joseph Bech, who became Prime Minister after Pierre Dupong's death in 1953.
He was also Minister for Families and the Interior.
On 29 May 1958 he became Prime Minister.Only a year later, in 1959, he died in ZĂĽrich.He was married to Madeleine Kinnen, herself a politician and government minister.