[2] She became a soprano singer, and enjoyed her first major success at age 20 with the title part in Tosca.
She quickly became one of the most popular singers at Opéra Garnier and Opéra-Comique, where she performed from 1935 through 1952.
[3] She appeared often in Massenet operas, performing in Manon and Thaïs, and appearing at the June 1942 Massenet Gala singing the title role in a tableau of Esclarmonde.
[4] In 1951 she appeared in the documentary Of Men and Music, singing excerpts from Salome's part in Hérodiade.
On 15 November 1947 Dosia debuted at the Metropolitan Opera as Tosca to Jan Peerce's Cavaradossi and Frank Valentino's Scarpia with Giuseppe Antonicelli conducting.