He studied at the French Press Institute and Panthéon-Assas University.

From 2012, he regularly appeared on BFM TV, most notably in shows hosted by Apolline de Malherbe; starting 2018, he was the host of Brunet Vendredi 19h on Fridays.

Brunet published several books and opinion articles, in various magazines including L'Express and Valeurs Actuelles;[1] he is best known abroad for calling France "irreformable".

In 2020, he left BFM TV and RMC to join La Chaîne Info as a columnist and host of the two-hour 10 a.m. weekdays show Brunet Direct and Brunet & les Agitateurs on Friday evenings.

Following a proposition of Édouard Courtial, a member of the National Assembly for Oise, he was made a Knight of the Legion of Honour in 2012 by the Ministry of Culture, as part of its annual promotion.