He is the great-grandson of French resistance fighter Louis Maniez who was executed by Nazi forces in 1944 and has a bridge named after him in Bourbourg.
He later returned to the L'Ecole Maritime de Boulogne to train as a bridge watch officer but chose to enter politics instead.
[2] In 2020, he was elected as a municipal councilor in Bourbourg for the National Rally and became a delegate for overseeing military and patriotic ceremonies in this capacity.
He won the seat in the second round, defeating EELV and NUPES affiliated candidate Emilie Ducourant.
[4] Berteloot is openly gay and in interviews ahead of the legislative election stated that his experiences with homophobic bullying in school shaped his decision to get involved in politics.