He graduated from Sciences Po the following year and earned a master's degree from the University of Paris 1 in 1974.
[2] After his retirement from his political career, he served as an advisor for territorial relations in the executive office.
He was the first leader of the France-Ireland relationship group in the Senate and was the auditor for the 37th session of the Institut des hautes études de défense nationale, the 26th session of the Centre des hautes études de l'Armement, and the 5th session of the Institut des hautes études de la sécurité intérieure.
He supported Ségolène Royal in the 2007 French presidential election, although she did not advance to the second round.
Loridant served as a General Councillor for the Canton of Les Ulis and was president of the socialist group in the Departmental Council of Essonne.