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1966 – 1968
Co-founder of the band Breadwinners (members: Vlado Bielko, Fero Kessler, Tony Šidlík, Kamil Mrva, Peter Líška) with a cover repertoire (Pretty Things, The Rolling Stones, Jimi Hendrix Experience, Small Faces)
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1967
First performances in Trnava, Piešťany, Báhoň, and Trenčín
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1969 – 1971
Member of the band The Breakers (with drummer Tony Šidlík), concerts across Slovakia
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1970
Performance at the Open Air Rock Festival in Vienna
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1972
Instrumental trio Vivat Musica (Tóno Šidlík, Koloman “Cuco” Gajlík); concert at the Fortuna club in Trnava
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1973 – 1975
Performed with Alino Gajlík’s formation at the Krym café in Trnava
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1981 – 1982
Member of the group Pulz, focused on Texas electric blues (with drummer Oto Berežný and bassist Fero Fuňák)
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1985
Founded F. K. Blues Band (later renamed F. K. Band), with various musicians over time including Vlado Machala, Oto Berežný, Pavol Parízek, Peter Stojka, Jožo Šinský, and Bystrík Sorát
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1988
Performed as Fero Kessler Band (Fero Kessler, Oto Berežný, Dušan Strapec); concerts at the club on Kominárska Street in Bratislava, at DK Nivy, and at the Rača Blues festival
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1997
Performed at the Blues Slovakia festival (Trnava) with the band Hard Skull