She was active at the Royal Dramatic Theatre in 1837-42. Between 1842 and 1846, she was active at the Nya Teatern. In 1847, she married the actor Lars Erik Elfforss, director of his own recently formed theater company. Subsequently she performed under the name Thérèse Elfforss. She was an actress with the travelling Elfforss Theater Company and from 1886-88 served as its director. She took over the leadership of the theater company during her husband's illness and formally after his death in 1869. As an actress, Thérèse Elfforss started in roles as ingenue and heroine but moved on to character roles in modern Nordic and foreign plays of the new realistic movement. According to a critic: "Her performances was characterized by spirituality, fine details, lively vitality", and in recognition of her ability, she was given the sobriquet "The Elise Hwasser of the countryside", after the renowned actress of the Royal Dramatic Theatre, who was at that time regarded the greatest actress in Sweden. Thérèse Elfforss enjoyed great respect during her career, particularly in her capacity as a director: As director, she focused on Nordic plays, such as Swedish plays by F. A. Dahlgren, C. Axel Anrep, Emilie Lundberg, but also Lorentz Dietrichson, Bjørnstjerne Bjørnson and Ibsen. Her greatest financial success was, however, Around the World in Eighty Days by Jules Verne, and she also staged less serious operettas, because "During the grand days of the Elfforss company in the 1870s and 1880s, the taste for operettas was so great that such an economic and practical director as Mrs E. could scarcely ignore it." Her company performed with success at the Djurgårdsteatern at Djurgården in Stockholm, and toured Finland in 1869, 1870, 1874, 1877 and 1878. In 1888, she transformed the leadership to stage director and theatre managerAugust Lindberg after which the theater company changed its name to the Lindeberg Theater Company. She continued to perform in the Lindeberg company until 1893. Between 1890 and 1893, the Lindeberg company staffed the Stora Teatern in Gothenburg. When the Lindeberg company was dissolved in 1893, she retired with her son Julius Erik Engelbrekt Elfforss to Stockholm where she died in 1905.