[4] He became agrégé in grammar studies at the École Normale Supérieure in 1959[5] and earned a PhD in linguistics in 1975 after a thesis on Vedic Sanskrit grammatical cases.
[7] He also served in the Scientific Council of the FN until the late 1990s[1] when he decided to follow Bruno Mégret and his splinter party Mouvement National Républicain.
He was a professor of Sanskrit and dean of the faculty of letters at the University Lyon 3 and a directeur d'études at the 4th section of the École Pratique des Hautes Études.
[11] In 1995, he participated in the founding of the nativist movement Terre et Peuple, along with Pierre Vial and Jean Mabire, and served as its vice president.
The work of the commission was mooted when Haudry's successor, Jean-Paul Allard, dissolved the institute and reconstituted it as an association free from state supervision.