Olivier Klein is a prominent figure in French politics, finance, and academia. He served as Minister Delegate of Cities and Housing in the government of Prime Minister Élisabeth Borne from 2022 to 2023. Prior to this, Klein had a significant political career, including serving as mayor of Clichy-sous-Bois from 2011 to 2022. He joined the Socialist Party (PS) in 2006 and was appointed president of the National Agency for Urban Renewal (ANRU) in 2017.