After Conservatory, Musaelyan entered the graduate school Gnessin State Musical College and studied with Professor B Berlin.

The first international chamber music festival to be held in Mikkeli (Finland) had Musaelyan as Artistic Director and Vladimir Ashkenazy as Honorary President.

The festival was also attended by other students of Flier: M.Pletnev with the Russian National Orchestra, V Feltsman, I Berkovich, D Ratser, A Zandmanis, M Abramyan, I Olovnikov and others.

Since 2005, Musaelyan has also been engaged in teaching, giving master classes at University of Texas–Pan American and the M.M.Ippolitov-Ivanov State Musical Pedagogical Institute in Moscow, and lecturing on pianistic art in different countries.

[2] Sergey Musaelyan has at various times performed with such conductors as Vladimir Ashkenazy, Valery Gergiev, Ulf Soderblom, Mikhail Pletnev, Osmo Vanska, Saulius Sondeckis, Fuat Mansurov, Peter Dabrowski, Kristjan Järvi, and Konstantin Krimets.