Active at the time in the University Antifascist Front for Peace in Algeria, Blanc is subsequently invited by Fidel Castro to the Latin American Solidarity Conference in Cuba in the summer of 1967.

[1] After graduation, Blanc joined a subsidiary of the Caisse des dépôts, a French public sector financial institution, before becoming bureau chief at the Ministry of Youth and Sports.

[5] In 1997, Blanc offered a new strategic plan to continue the restructuring of the company, only to clash with newly elected Prime Minister Lionel Jospin.

[3] In September 2014,[9] Christian Blanc was designated CEO of Syphax Airlines,[10] a position he held for just two months because the Tunisian company had failed to go through the necessary administrative procedures allowing it to hire a foreign employee.

During François Mitterrand's presidency, he refused offers from both Rocard and later Édith Cresson to enter government and instead remained in his position with the RATP Group.

Six months later, Blanc submitted an official report, entitled For an Ecosystem of Growth,[15] whose recommendations included creating business clusters.

On March 18, 2008, Blanc was appointed Secretary of State of the Région Capitale ("Greater Paris"), a new position in the French Government of François Fillon.

In June 2010, after Blanc dismissed his chief of staff, allegations regarding his tax situation appeared over the next eight days in France's Canard Enchaîné newspaper.

[21] After discussions with then-Prime Minister François Fillon, the two men released a statement in which they jointly declared it "suitable that Mr. Blanc honors his personal expenses in full."

The matter helped accelerate Blanc's decision to leave government, with the opposition and elements of press speculating that his exit might be a tactic by the ruling UMP to turn media attention away from President Nicolas Sarkozy's role in the Woerth-Bettencourt scandal.

[23] On December 2, 2011, the High Court of Paris found Christian Blanc to have acted in good faith in relation to the cigar affair and dismissed those charges against him.