[1] A former member of the Socialist Party (PS), which he left in June 2017 to join La République En Marche!

(LREM), he previously served as Deputy Mayor of Paris for Transport (2012–2014) under Bertrand Delanoë and for Finance (2014–2017) under Anne Hidalgo.

A 2000 graduate of the École nationale d'administration, Bargeton joined the Court of Audit as a financial magistrate prior to his involvement in politics.

On 29 March 2008, shortly after his election to the Council of Paris, he assumed the first deputy mayorship of the 20th arrondissement, a position he held until 5 April 2014.

He subsequently returned to the Council of Paris as president of a new group for La République En Marche, Democrats and Progressists, on 20 November 2017.