Since 26 October 2023, he has presided over the bicameral Délégation parlementaire au renseignement, which supervises France's three main intelligence agencies.

A jurist by occupation, he was elected to the General Council of Territoire de Belfort in 2001 for the canton of Beaucourt, at age 27.

[3] In 2021, he was returned to the Departmental Council of Territoire de Belfort for the canton of Delle while keeping his Senate term.

[4] On 6 October 2023, Perrin was elected to preside over the Senate's Committee on Foreign Affairs, Defence and the Armed Forces.

[5] Since 26 October 2023, he has also presided over the Délégation parlementaire au renseignement, the eight-member (four deputies, four senators) body tasked with supervising France's three main intelligence agencies (DGSE, DGSI, DRI).