He was LREM's candidate for Mayor of Paris in the 2020 municipal election before he withdrew due to a sex scandal and was replaced by Health Minister Agnès Buzyn.

[4][5] Between 2003 and 2008 Griveaux began working for A Gauche en Europe, a think-tank founded by Dominique Strauss-Kahn and directed by Michel Rocard.

[8][9] In 2014 Griveaux renounced his mandates in order to take up a post with the commercial real estate company Unibail, prompting criticism from a local official.

[12] On 21 June 2017, Griveaux was appointed to the second Philippe government as a secretary of state at the Finance and Economy Ministry, a newly created role.

The Huffington Post reported the extent of Griveaux's remit is unclear, and that he will serve as deputy or assistant (Fr: adjoint) to Finance Minister Bruno Le Maire.

[15] In February 2020 Griveaux abandoned his bid to become mayor of Paris after it was alleged that he had "exchanged intimate mobile phone messages with a young woman and sent her an explicit video of himself masturbating", which was later posted online by Petr Pavlensky.

[18] In January 2019, Griveaux had to escape his office after protesters broke into the compound and smashed up vehicles during the broader Yellow vests movement.