Born in October 1970 in Saint-Loup in French-speaking Switzerland, Bertschy became a graphic designer and worked in that capacity for Philip Morris for 8 years. After winning the "new talent" competition of the Sierre comic book festival in 1999, he started out professionally in "TCH├Ф !" magazine, illustrating a comic strip called "Jimmy Brocoli." It was then that Editions Gl├йnat offered him a chance to create a series of his own. This resulted in the creation of "Smax," which appeared monthly in "TCH├Ф !". Then, in February 2001, Bertschy launched his comic strip "Nelson" in "Le Matin" (no. 1 daily newspaper in French-speaking Switzerland), a phenomenon that has now reached 3,500 strips. In 2018, the first compilations of the series were published in English by Europe Comics.