On 21 June 2017 she was appointed Secretary of State to the Minister for the Ecological and Inclusive Transition, Nicolas Hulot, in the Second Philippe government, and left her seat as a member of the National Assembly to her substitute Adrien Morenas.

Upon taking office, Nicolas Hulot announced that she will be in charge of the sea, biodiversity and oceans and delegates to her the European subjects.
She attended the vast majority of the Councils of Energy and Environment Ministers, covering topics as diverse as the circular economy, the reform of the European electricity market, the governance of Energy union and climate, or the carbon emission trading.
On 21 June 2017 she was appointed Secretary of State to the Minister for the Ecological and Inclusive Transition, Nicolas Hulot, in the Second Philippe government, and left her seat as a member of the National Assembly to her substitute Adrien Morenas.
Upon taking office, Nicolas Hulot announced that she will be in charge of the sea, biodiversity and oceans and delegates to her the European subjects. She attended the vast majority of the Councils of Energy and Environment Ministers, covering topics as diverse as the circular economy, the reform of the European electricity market, the governance of Energy union and climate, or the carbon emission trading.
Brune Poirson