[1] He represented Seine-Maritime's 5th constituency as a member of the Socialist, Radical, Citizen and Miscellaneous Left.

[1] From 2015 to 2018 he was chairman of the board of ANDRA, the French National Radioactive Waste Management Agency.

[2] He was elected mayor of Barentin on 28 May 2020 and resigned from the National Assembly on 18 June because of cumulation of mandates.

His substitute, Bastien Coriton, was also elected mayor in Rives-en-Seine, so resigned from the assembly five days after taking office.

[4] After the resignation of Caroline Cayeux, who was appointed Minister Delegate for Territorial Communities by Élisabeth Borne, and the interim period of Michel Fournier, he was elected President by the members of the board of directors of the National Agency for Territorial Cohesion on December 13, 2022.