in conjunction with the Jacques Hadamard Mathematical Foundation... In 1986, he was appointed Technical Advisor to the office of Gérard Longuet, minister for Postal Services and Telecommunications... He spent most of his career at Saint Gobain, which he joined in 1986... In 1987, he was appointed First Secretary to the French Embassy in London, before joining, in 1989, the Economic Affairs Division of the Ministry for Foreign Affairs in Paris.