A graduate of the Institut d'études politiques (IEP) in Aix-en-Provence (1998), with a Master's degree in journalism from the University of London (2001), and an ENA graduate in 2012, Muriel Signouret's previous positions include Chief of Staff to Chairman and CEO Jean-Pierre Farandou and Director Delegate for Territories, Institutional Relations and International.

She joined SNCF Gares & Connexions in February 2023 as Director of Paris Lyon and Paris-Bercy Bourgogne Pays d'Auvergne train stations.

On May 2, 2024, she became CSR Director. In this capacity, she is appointed a member of the Group's Executive Committee.