[1] His last political position is secrétaire général Cabinet du président de la République française [fr] of French President Hollande.

After which, in accordance with the strict system of selection reserved for honours graduates of ENA in the French Administration he was to immediately be eligible for and become a member of the elite group of Inspecteurs des finances (auditor at the Ministry for the Economy and Finance, with special responsibility for the inspection of public finances), before taking a succession of senior posts such as Principal at the Service de la legislation fiscale (tax legislation department), and Principal Private Secretary of the Minister of Industry, Foreign Trade and Town and Country Planning until 1991.

From 1995 until 1997, Jouyet was a partner in Jeantet & Co, a French business law firm, which he left at the request of the Prime Minister Lionel Jospin to become his Deputy Principal Private Secretary until 2000, during which he contributed to France's entry into the Eurozone.

Ahead of the 2007 presidential election, Jouyet was one of the initiators and signatories of the petition which was to become known as "l'appel des Gracques" seeking an alliance between France's Socialist Party and the center-right Union for French Democracy (UDF).

At the conclusion of this assignment, Jouyet was then nominated by President Sarkozy on 14 November 2008 to become Chairman of the French securities regulator, the AMF, to replace Michel Prada, at the end of his non-renewable 5-year mandate, on 15 December 2008.