Marguerite studied at the Institut d’Etudes Politiques de Paris (Sciences Po, 1999), and at Princeton University where she did her Master’s degree in Economics and Public Affairs (Woodrow Wilson School, 2001)
She then entered the Ecole Nationale d’Administration (2002-2004), and began her career in the
French public service at the Inspection Générale of the Ministry of Finances in 2004.
In 2007, Marguerite became advisor for social affairs to President Nicolas Sarkozy.
In 2010, she became chief of staff of Xavier Bertrand, who had just been apointed minister for social affairs.
In June 2012, Marguerite joined BPCE, the second largest banking group in France, to be appointed deputy chief executive officer in charge of strategy, and member of the management committee.