Thorborg made her debuts at the Royal Swedish Opera in 1923 as Lola, in 1924 as Ortrud and in 1925 as Amneris. After six years at the RSO, she moved to the Nürnberg opera for two seasons, after which she moved to Austria in disgust at the growing power of the Nazis. Unfortunately she had to move again to the USA after Hitler annexed Austria. Her final move was back to her native Sweden, where she lived out her retirement. She was regarded as one of the finest actresses in Opera.