After he graduated, Sire helped publish Métal hurlant, which was run by Jean-Pierre Dionnet and Philippe Manœuvre.
In 1978, Sire created five different covers for Presses de la Cité, and did the same for Cheval Noir in 1992.
[4][5] In 1997, he published a comic book with Jean-Pierre Dionnet, titled L'île des amazones.
In 2006, Sire made 24 paintings representing the 24 hours of the Le Mans Classic race.
That same year, Nickel Productions published a collection of his works, recounting his career.