He went to live in Los Angeles in the early 90s for 8 years where he became assistant to famous photographers such as Herb Ritts, LaChapelle, Lindbergh, Steven Klein, Craig Mc Dean, Sante d’Orazio, Michel Addi on fashion shoots for Vogue and François-Marie Banier on portraits for the New York Times.
In 2000, settled in Paris, he became a professional photographer.
n 2016, Guillaume moved to Lyon with his little family where he met Claude Cartier to carry out his projects in images which would appear in magazines such as Idéat, Elle Déco and Artravel