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1955 – 1960
Conservatory studies in Brno and Bratislava (violin play)
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from 1959
member of the Czechoslovak Radio Symphony Orchestra, later Slovak Philharmonic; co-operator of the music department of the Czechoslovak Radio
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from 1964
concert master of the orchestra of the State Opera Banská Bystrica
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1967
engagement in the orchestra of the City Theatre St Gallen (since 1969 as concert master); foundation of the Cotteli Quartett
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1970 – 2005
member of the orchestra of the Opera in Zürich
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since 1976
pedagogue at the Conservatory in Zürich