Born in 2000, Grégoire Torossian began playing the violin at the age of 4. In 2018, he entered the Conservatoire National Supérieur de Musique et de Danse de Paris (CNSMDP) in the class of Ami Flammer and obtained his Master's degree five years later in the class of Svetlin Roussev and Pierre Colombet. He also studied with Karen Aroutiounian in Brussels for a year. He is now continuing his studies at the Paris Conservatoire on the Diplôme d'Artiste Interprète (DAI) programme.

He has won several international competitions, including the Leonid Kogan Competition in Brussels and 3rd Prize at the George Enescu International Competition in Bucharest in September 2022. Grégoire Torossian has taken part in numerous masterclasses throughout Europe, enriching his training with musicians such as Julia Fischer, Kirill Troussov, Sarah Nemtanu, Patrice Fontanarosa, Pierre Amoyal and Sergey Khachatryan.

He has performed in such prestigious venues as the Kiev Philharmonic, Geneva's Victoria Hall (string quartet), the Paris Philharmonic (concertmaster of the Orchestre Paris-Vienne conducted by Alain Altinoglu) and the Bucharest Athenaeum (soloist with the George Enescu Festival Orchestra).

Grégoire Torossian plays on Jean-Baptiste Vuillaume's 'Faisan Doré' (1863), made available by a private collector.