Thierry Wasser was born in Lausanne, Switzerland, on the Lake of Geneva.  Being fascinated with plants and nature as a young boy, he dried herbs in his attic and made numerous preparations including syrups, alcohol infusions and teas.  From ages sixteen to twenty, Thierry Wasser seriously pursued his passion, and obtained his Federal Diploma of Botany.  He attended the Givaudan Perfumery School in Geneva and became a Junior Perfumer at twenty four.  Two years later, Thierry Wasser was promoted to Perfumer and was sent to Givaudan in Paris, where he worked for an additional six years in fine fragrances.

In 1994, Thierry Wasser moved to New York City and joined Firmenich International Fine Fragrance Center as a fine fragrance Perfumer.  He moved to Paris in 2002 and worked at Firmenich Paris until May 2008.

Thierry Wasser became the new Guerlain nose in 2008.