In 1945, he published his first novel,
Éducation européenne. Immediately following his service in the war, he worked in the French diplomatic service in
Bulgaria and Switzerland. In 1952 he became the secretary of the French Delegation to the United Nations. Gary also published as Shatan Bogat, René Deville and Fosco Sinibaldi, as well under his birth name Roman Kacew. In addition to his success as a novelist, he wrote the screenplay for the motion picture
The Longest Day and co-wrote and directed the film
Kill! Kill! Kill! Kill! (1971), which starred his wife at the time,
Jean Seberg. In 1979, he was a member of the jury at the
29th Berlin International Film Festival.
As Émile Ajar In a memoir published in 1981, Paul Pavlowitch claimed that Gary also produced several works under the pseudonym
Émile Ajar. Gary recruited Pavlowitch – his cousin's son – to portray Ajar in public appearances, allowing Gary to remain unknown as the true producer of the Ajar works, and thus enabling him to win the 1975 Goncourt Prize (a second win in violation of the prize's rules). Gary also published under the pseudonyms Shatan Bogat and Fosco Sinibaldi. == Diplomat ==