Hubert Geiser began playing the violin at the age of 6 at the Conservatoire de Cergy-Pontoise. In 2002, at the end of his studies at the Conservatoire de Boulogne-Billancourt with Maryvonne Le Dizès, he was unanimously awarded a First Prize. The same year, he began playing the viola with Marie-Christine Witterkoer. In 2004, he joined Jean Sulem's class at the Conservatoire National de Paris where he was awarded a First Prize in 2008. He studied chamber music with Vladimir Mendelssohn and Marc Coppey in string quartet and piano quintet and participated in master classes with the Talich, Ludwig and Juilliard Quartets as well as with soloists Nobuko Imai, Jesse Levine, Thomas Riebl and Antoine Tamestit.

In 2006, he studied for one year at the Music Academy in Lübeck, Germany, as part of the Erasmus program with violist Barbara Westphal and cellist Troels Svane in chamber music. In 2008, he joined the ranks of the Orchestre National de France and plays under the direction of Kurt Masur and Daniele Gatti.

He is laureate of the International Avignon Competition in 2003 and of the International Lionel-Tertis Competition in 2006.

He joined the Orchestre de la Suisse Romande in 2010.