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1932
worked in the Music Department of Cs. Radio in Bratislava
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1941 – 1945
dramaturg in Slovak Folk Theatre in Nitra, at the same time music expert in the Cs. Radio in Bratislava
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1945 – 1948
director of Chamber Music in Bratislava
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1951
Dissertation thesis: Development of Realism and Harmonious Thinking in the Work of Eugen Suchoň
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1953 – 1958
archivist of the Association of Slovak Composers, later head of the Music Information Centre at the Slovak Music Fund in Bratislava
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1979
first president of the Slovak section of the New Bach Society at the Association of Slovak Composers, initiator of the Bach Festival in Bratislava, member of the Directorate of International Bach Society in Leipzig, a member of the Society for Music Research in Kassel, the Society for Musicology in Basel in Switzerland
Ernest Zavarský is one of the founders of modern Slovak music historiography and Nestor of Slovak musicology.
He is an author of notes and entries about Slovak music for encyclopedias – German Encyclopedy Musik in Geschichte und Gegenwart (MGG), Muzička Enciklopedija / Encyclopedy of Music (Croatia), and he was their most prolific contributor.
The cultural public was interested in his music reviews, as well as theatrical reviews. As a well-known organologist, he projected several designs of organs (Audio and Visual). He is the author of extensive reforms of organs in Slovakia, as well as an author of major monographs about Ján Levoslav Bella and Johann Sebastian Bach.
He studied musicology, composition, piano and organ in Innsbruck, Munich, Krakow, Psychology and Art History at the Comenius University in Bratislava, and graduated from Janáček Academy of Music and Performing Arts in Brno.
He lectured at the universities in Leipzig, Berlin, Warsaw, Dresden, Cologne and others, mostly on contemporary Slovak music, folklore and the Bach family in Bratislava.