After studying at the École d'art dramatique Jean-Périmony (drama school) and a very brief career as an actor, Cyril Dion coordinated projects for the 'Fondation Hommes de Parole'.

He has written poetry since he was 17 and published in 2014 a collection of poems (Sitting on the edge) Assis sur le fil, Table Ronde Editions.

For the French newspaper Libération "Cyril Dion succeeds in one hour and fifty-eight minutes, what decades of environmental struggle failed to do: lay the foundations for a" new collective fiction".

Seven concerts throughout France brought artists together to perform, he performed with about forty artists including Alain Souchon, Matthieu Chedid, Izia, Dominique A, Albin de la Simone, Arthur H, Zaz, Tryo, Emily Loizeau, Jeanne Cherhal, Bastien Lallemant, Piers Faccini, Gael Faure, Xavier Polycarpe, Sebastien Hoog.

[12] For Charlotte Bloch in the French weekly magazine L'Express: "Far from being moralistic or utopian, this incisive little book full of ideas is a real breath of fresh air because of its particular approach to modern ecology.

As in his book "Petit Manuel de Résistance Contemporaine", he develops the thesis that stories play a preponderant role in the evolution of society.

On 21 May 2019 he created with the guitarist and composer Sébastien Hoog, the show Résistances Poétiques at the Maison de la Poésie in Paris,[13] which mixes poetry and music.

[14] For Cyril Dion :"Faced with the prospect of an ecological collapse, immersed in the digital age, caught up in the whirlwind of information, confronted with violence and inequality, we need poetry, beauty and music.

[17] On 4 December, he called on the yellow jacket movement to join the climate marches, considering that :"If we lose this battle, there will be no more purchasing power to defend or democracy to protect.

[18] »On 18 December 2018, he took part in the action L'Affaire du Siècle, launched by four NGOs (Greenpeace, Oxfam France, la Fondation Nicolas Hulot and Notre affaire à tous).

[20][21] On 13 February, he met with Emmanuel Macron and actress Marion Cotillard and proposed to the president to set up such an assembly to seek solutions on the citizens' initiative referendum, ecological transition and fiscal justice.

[22] On 13 April 2019, he explains in an interview with Le Monde why he believes that only collective intelligence can provide solutions to a problem as complex as the climate crisis.