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1976 – 1982
Conservatory in Košice (trombone – Pavol Takáč)
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1985 – 1988
Academy of Performing Arts Bratislava (Jozef Gašparovič)
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1984
first trombonist of Symphonic Orchestra Zlín, later Dance Orchestra of Slovak Television under the leadership conducting of Siloš Pohanka and Braňo Hronec
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since 1985
first trombonist and alto trombonist in State Philharmonic Košice (also soloist in the number of concerts)
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1986 – 2003
teacher of trombone and chamber music at Conservatory in Košice
Ján Hrubovčák actively cooperated with many domestic and foreign orchestras as tenor-, alto- and bass trombone. He organized several performances of an “exhibition” character focused on introducing different wind instruments – tenor-, alto- and soprano trombone, F tuba, alto saxophone, tenor saxophone, cornett, piccolo trumpet and others. This set of instruments he uses in numerous musical-educational programs for youth. The enthusiastic preparation of these concerts and their implementation are an important part of the artistic work of Ján Hrubovčák.