During his youth, he was a member of the French Section of the Workers' International (SFIO) and subsequent Socialist Party (PS) until 1992.

He most notably had Laurent Gbagbo, Charles Pasqua, Marine Le Pen, Valérie Bègue, as well as Paul Aussaresses as clients.

[3][4] Along with Marion Maréchal and other FN senior executives, Collard took part in the mass demonstrations against same-sex marriage organized in Paris by La Manif pour tous movement in the first half of 2013.

On 17 April 2017, during a Marine Le Pen rally for the 2017 French presidential election, an anti-fascist disrupter threw a Molotov cocktail towards him; he sustained minor injuries amid a quick reaction by police officers.

On 22 January 2022, Collard along with Jérôme Rivière left the RN for Reconquête, the party of the far-right presidential candidate Éric Zemmour.