• 1955 – 1960

    Conservatory studies in Brno and Bratislava (violin play)

  • from 1959

    member of the Czechoslovak Radio Symphony Orchestra, later Slovak Philharmonic; co-operator of the music department of the Czechoslovak Radio

  • from 1964

    concert master of the orchestra of the State Opera Banská Bystrica

  • 1967

     engagement in the orchestra of the City Theatre St Gallen (since 1969 as concert master); foundation of the Cotteli Quartett

  • 1970 – 2005

     member of the orchestra of the Opera in Zürich

  • since 1976

    pedagogue at the Conservatory in Zürich