In 1980, I entered the research centre of what would later become Météo-France, after studying at the Ecole Polytechnique and the Ecole Nationale de la Météorologie. I participated in the development of the institution's successive climate simulation models. Ten years later, I was appointed head of the team responsible for promoting the climate model from the weather prediction model. My activity then diversified, through numerous international projects, towards the issues of regionalization of climate change and seasonal forecasting. In 2006, I supported an authorization to conduct research on this last theme. In 2016, I was appointed head of the team responsible for setting up and improving the seasonal forecasting system for Météo-France.