In September 1982, he did a 16-month national service in Cameroon, and on his return, he decided to work full time on a social project in the Borny ZUP, in Metz.

In August 2010, the BTP Consolis (Bonna Sabla) building and public works group asked him to go to Egypt, initially to revitalize its Egyptian subsidiary, then for objectives that were quickly less ambitious in economic terms after the Arab Spring.

He is invested as a candidate under the agreements between La République en marche and the MoDem during the legislative elections in the Seventh constituency for French residents overseas.

On this occasion, he will meet with many government actors, academics and members of NGOs present there, including the 2006 Nobel Peace Prize winner, Muhammad Yunus.

[13][14] On 25 March 2019, following its constitutive meeting in Paris, Frédéric Petit joined the Franco-German Parliamentary Assembly before being appointed a member of its Bureau during its fourth session, on 21 and 22 September 2020.

[18] On January 5, 2022, he presented an information report to the Foreign Affairs Committee on the draft contract of objectives and means (COM) between the State and the Agency for French Education Abroad.

[19][20][21] On January 17, 2022, he presented a motion for a resolution inviting the French National Assembly to solemnly condemn the illegitimate regime of Alexander Lukashenko.

It demands the holding of new elections under the aegis of the OSCE and provides for the creation of a study group between French parliamentarians and representatives of democratic Belarus in exile.