His international career began with engagements at the Vienna State Opera in the 1951 season, for which he conducted Die Zauberflöte, Simon Boccanegra, and Capriccio.
[1] He was invited to succeed Georg Solti as chief conductor of the Bavarian State Opera in Munich from 1952 to 1954, and was permitted by the East German authorities to do so without severing his ties with Dresden.
He nonetheless conducted frequently at Covent Garden and was immensely popular there,[1] leading among other works, Salome, Elektra, Der Rosenkavalier, Der Ring des Nibelungen, Un Ballo in Maschera and Madama Butterfly, of which the critic Andrew Porter compared Kempe's operatic conducting favourably with that of Arturo Toscanini and Victor de Sabata.
The Ring cycle he conducted there in that year was notable for multiple casting, with the role of Wotan split between Hermann Uhde and Jerome Hines, and Brünnhilde between Astrid Varnay and Birgit Nilsson.
[6] From 1965 to 1972 Kempe worked with Tonhalle-Orchester Zürich, and from 1967 to his death conducted the Munich Philharmonic, with whom he made international tours and recorded the first quadraphonic set of the Beethoven symphonies.