His focus shifted to opera in the 1980s and he has worked at many of the leading international opera houses within Europe, as well as, by special invitation, some renowned opera houses in the United States and the eastern hemisphere.
Fokusnya beralih ke opera pada 1980an ia bekerja di beberapa rumah opera internasional utama di Eropa, serta, pada undangan khusus, beberapa rumah opera terkenal di Amerika Serikat dan hemisfer timur.