A member of the Socialist Party (PS), he was later elected to the National Assembly in 1997, where he represented the 1st constituency of Alpes-de-Haute-Provence for three terms.

Bianco also held a number of local elective mandates at the municipal, departmental and regional level from 1992 to 2012.

[1] An alumnus of the École nationale d'administration, he joined the Conseil d'État in 1971 with the rank of auditor.

[2] Appointed chargé de mission at the Élysée in 1981, Bianco became President François Mitterrand's chief of staff in 1982, a role he retained until 1991, when he was named Minister of Social Affairs and Integration under Prime Minister Édith Cresson.

He left the position following the 1993 legislative election, as the right led by Jacques Chirac regained a parliamentary majority in the National Assembly.