Marion Waller is Deputy Director of the Cabinet of Jean-Louis Missika, Deputy Mayor of Paris in charge of urban planning, architecture, attractiveness, economic development and Greater Paris projects.

In particular, she piloted "Réinventer Paris" and the calls for innovative projects that followed. In parallel, she is involved in environmental philosophy and in 2016 published "Artefacts naturels" (Editions de l'Eclat), a book on ecological restoration and the possibilities of human re-inhabitation of the environment. She teaches at Sciences Po Paris and at the University of Paris Est-Créteil and is passionate about environmental ethics applied to territories.

In 2018 she presented the green building revolution in Paris in a TEDx conference: