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1998 – 2002
Private Conservatory of Dezider Kardoš in Topoľčany (composition – Pavol Procházka)
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2001 – 2006
Faculty of Music Arts of Academy of Arts in Banská Bystrica (composition – Vojtech Didi)
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2005
Scholarship Erazmus at Akademia Muzyczna im. Feliksa Nowowiejskiego v Bydgoszczi (composition – Zbigniew Bargielski)
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2006 – 2007
Music dramaturgist at Slovak Radio in Bratislava
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2006 – 2008
Assistant of composition at the Faculty of music arts of Academy of Arts in Banská Bystrica
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since 2006
Pedagogue of special subjects at Private Conservatory of Dezider Kardoš in Topoľčany
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2012 – 2015
Pedagogue of Church Conservatory in Bratislava
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2012 – 2015
Music dramaturgist at Slovak Radio in Bratislava
Jaroslav Hruška is also active as a composer of popular music, pianist, singer and organizer of musical events.