While in Europe, after studies at the Sorbonne, David had the opportunity to work with chefs Roger Vergé, Paul Bocuse, Joël Robuchon, Gaston Lenôtre, and Frédy Girardet.
In 1984, he spent the year as a chef with Frédy Girardet in Crissier before joining « Le Patio » reataurant where he sous-chef de cuisine from 1985 to 1986.