Aged 55, Jérôme Nanty is a graduate of the Institut d'Etudes Politiques de Paris and holds a Master’s degree in Public Law. He began his career in 1986 at the Société Générale before joining the Capital Markets Branch of the Crédit Lyonnais in 1989, first as a Bond Market Operator, then as Manager of a portfolio of bond issuing customers.

In 1998, he joined the Human Resources Department as Manager of employment policy, then labour relations. From 2001 to 2004 he served as Director of Labour and Social Relations for the Crédit Lyonnais group. He was responsible for the same area of activity for the Crédit Agricole group as from 2003. As such, he was in charge of the social aspect of the merger between the Crédit Lyonnais and the Crédit Agricole. He was appointed Director of Human Resources for LCL in 2005 and the Caisse des Dépôts Group in 2008.

From 2013 to date, he was Secretary General of the Transdev Group.