Mychajliszyn said goodbye to his scientific career and never looked back. Between 1991 and 2013, he directed several amateur and professional vocal groups, including the Chœur français d’Opéra, the Chœur des universités de Paris and the Conservatoire Municipal Charles Münch choir in Paris’ 11th arrondissement. In 1996, he obtained his secondary-school teaching diploma in music education and choral singing. In 1998, Michel Piquemal sought him out for the role of assistant director of his Ensemble Vocal group, before appointing him as associate director of the Regional Île-de-France Vittoria Choir in 2011. That same year, he was awarded the distinction of Knight of the Order of Academic Palms (Chevalier de l’Ordre des Palmes Académiques). From this point on, the two men’s paths were closely linked.
Music is now the sole focus for Mychajliszyn, giving him the opportunity to work with notable names such as Jean-Claude Casadesus, Charles Dutoit, Christoph Eschenbach, Jacques Mercier, John Nelson, Michel Plasson and Yutaka Sado, as well as the chance to direct the Lithuanian National Orchestra, the Musique principale de l’Armée de Terre, the Orchestre lyrique de Paris and the Charles Münch orchestra. Each summer, he leads the Sylvanès Abbey choir and orchestra academy (Académie de chœur et d’orchestre de l’abbaye de Sylvanès).