Marie Grison graduated from the Ecole des Hautes Etudes Commerciales (HEC) in 1992, and began her career at Crédit Lyonnais in the General Inspection division. She then worked in the capital market sector and in the market risk department. In 2004, she joined Ixis-CIB as risk manager in charge of rates.

 In 2006, she joined the Natixis Group Risk Management Department as Head of the Credit Risk Department and, in 2010, as Head of the Consolidated Risk Department.

Marie Grison joined CNP Assurances in 2013 as Group Chief Risk Officer and a member of the Executive Committee. She was appointed Administrative Officer of CNP Assurances in February 2019.