He obtained a Certificate of Professional Competence in technical drawing and began working for a company manufacturing washing machines and clothes irons.

[2] François Asensi joined the Mouvement Jeunes Communistes de France at the age of 15, protesting the Algerian War.

Asensi resigned from the Jeunesse Communiste due to disagreements with the organization and subsequently took part in reviving the Seine-Saint-Denis federation of the PCF in 1974.

[1] Asensi sought to reform and modernize the party's structure and create a new communist program taking into account recent societal developments.

After having been municipal councillor of Aubrevilliers, Aulnay-sous-Bois and Villepinte, Asensi was elected mayor of Tremblay-en-France in 1991, succeeding George Prudhomme.

The union covered the communes of Tremblay-en-France, Villepinte, Aulnay-sous-Bois, Sevran and Le Blanc-Mesnil and aimed to develop public policy for people with disabilities.

[4] Asensi called for a common candidate representing all the anti-liberal forces on the left in the 2007 French presidential election, motivated by what he saw as a left-wing desire for social transformation in France after the 2005 referendum on the European Constitution.

He began campaigning for structural reforms to the Federation for a Social and Environmental Alternative and the Left Front, the latter of which he wanted to offer direct membership.

In 1990, he was the spokesman for the Gayssot Act, which prohibited the denial of crimes against humanity with the aim of combating racist, antisemitic and xenophobic behaviour.

From 8 October 1999 to 8 Avril 2000, Asensi was tasked by Prime Minister Lionel Jospin's government with implementing a reform to the classification of certain sports federations as charitable organizations.