Previously, he served as France’s Minister of Agriculture and Food from July 2020 to May 2022 in the government of Jean Castex. Before that, he was Deputy to the Minister of Territorial Cohesion in the government of Edouard Philippe between June 2017 and October 2018 and then Minister in charge of Cities and Housing until July 2020.
Previously, he was, advisor to the Minister in charge of Foreign Trade, Nicole Bricq; to the Minister of Economy and Finance, Pierre Moscovici; before becoming Deputy Chief of Staff of the Minister of Economy under Emmanuel Macron between 2012 and 2016.
Having qualified as Ingénieur des ponts, des eaux et des forêts, Julien began his career on secondment to the Department of External Relations of the Ministry of the Economy before holding various positions at the French Embassy in Cairo and at the Treasury Department.
Since 2022, Julien has been a senior advisor at RAISE.
In February 2024, Julien published Nourrir Sans Devaster, with Erik Orsenna.