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1960
member of Dixieland na Suchom Mýte in Bratislava (piano)
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1961 – 1969
member of the group Traditional Club
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1962 – 1967
Faculty of Construction of the Slovak Technical University in Bratislava
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1964
performed at the International Jazz Festival in Prague (with Traditional Club)
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1965 – 1966
performed with Traditional Club at festivals in Vienna, Budapest, Comblain la Tour (Belgium), Munich; tours in Hungary and the former East Germany; took part in a radio broadcast, Jazz in der Tschechoslowakei (the former West Germany)
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1967
participated in the Czechoslovak Amateur Jazz Festival in Přerov, where with Traditional Club, he won first prize in the traditional jazz category; performed at the jazz festival in Prague
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1968 – 1969
engagements in Zurich, Basel, and Geneva (Switzerland)
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1970
some members of Traditional Club remain in Switzerland, performing as the East European Dixieland Company (Igor Čelko, Peter “Lemon” Móric, P. “Mule” Molnár)
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1974 – 1978
member of the Roy King Dixieland Band, with trombonist Roy Crimmins (Great Britain)
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1978 – 1987
member of the Dixieland formation Smoking Band (Zurich)
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1988
leader of the Elite Syncopators quintet, oriented towards old-time jazz
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1991 – 1992
occasional concerts with members of Traditional Club
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1993
member of The Zigerhorns Dixieland Band, with which he played a tour in Australia
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from 1994
member of the Jazz Point Dixieland Band (Zurich; Matthias Jenny – trombone, Edy Kieser – banjo, Hans Brunner – drums, Herbie Saurer – trumpet, Jimmy Wettach – bass guitar, tuba, Igor Čelko – soprano saxophone, baritone saxophone)