He attended public schools in this area where he earned his Baccalauréat in Economics and Social sciences (Bac B).

In 1995, Chrétien entered the University of Franche-Comté where he obtained a master's degree in Economic and Social Administration with honors.

In 1996, he graduated from a specialized management program at Sciences Po Lyon.

[1] He began his political career as a parliamentary assistant to Alain Joyandet.

In 2019, Chrétien publicly declared his support for incumbent President Emmanuel Macron.