Mme Mathieu is French and of Senegalese origin. She has been working as a deputy head teacher since 2016, in France and
abroad and an interim year as CEO of the French school (elementary and secondary) of Yaoundé in Cameroon in 2017-18. After a scientific high school degree in Saint-louis of Senegal, she moved to Strasbourg in the east of France to study chemistry, physics and sociology. She has a master's degree in physical chemistry of polymers - materials and the bachelor degree level in sociology.
After having taught physical sciences in middle and high school in the academy of Strasbourg, she took the competitive examination for the position of Principal Education Counselor and occupied these functions before joining the corps of management personnel, after a French national competition. She has an unalterable passion for education because as Nelson Mandela said: "education is the great engine of personal development. It is through education that the daughter of a peasant can become a doctor, that a son of a mineworker can become the head of mine, that a child of farm workers can become the president of a great nation. It is what we make out of what we have, not what we are given, that separates one person from another."