Pénélope Komitès was first a teacher before working in event communication and then joining the associative world. From 1992 to 1998 she was the executive director of Greenpeace France : she namely conducted climate campaigns within the context of the Montreal protocol, campaigns on toxic waste within the context of Basel Convention, campaigns on biodiversity protection etc.
In 2001, she was elected representative in the 12th arrondissement. She was also deputy to the Mayor of Paris, Bertrand Delanoë, in charge of disabled people. She has especially committed in making municipal facilities accessible and improving autism management.
Since 2014, she is deputy to Mayor of Paris, Anne Hidalgo. She is in charge of green spaces, nature, biodiversity and funeral affairs. She implements the commitments of the mandate throughout the creation, by 2020, of 30 hectares (about 74 acres) of additional green spaces, the plantation of 20 000 trees and the creation of 100 hectares (about 247 acres) of green roofs. In 2015, she launched the “greening licence” to allow Parisians to do some gardening in the public space. In 2016, she has launched the first call for projects “Parisculteurs”: it will allow to turn 5.5 hectares (about 12 acres) of Parisian roofs into spaces devoted to urban agriculture. In 2017 she has launched a new edition of “Parisculteurs” on a surface of 10 hectares.