ヘルシンキ・フィルハーモニー管弦楽団
Between 1932 and 1936 Järnefelt was the artistic director and conductor of the Finnish National Opera. He presented, among others, Siegfried and Götterdämmerung from Wagner's Ring cycle, and Parsifal. He was principal conductor of the Helsinki Philharmonic Orchestra 1942–1943, and also returned to the Royal Swedish Opera as chief conductor from 1938 to 1946. He died in Stockholm.