Gripenberg debuted at the National Theater on 13 November 1911, dancing barefoot to music by
Chopin,
Gluck,
Rachmaninoff,
Sibelius and others. Critics were unanimous in their acclaim for her performance, though her aunt Alexandra urged her if she were to continue to perform, to adopt a pseudonym. In flowing costumes, and dancing in rhythmic free style, she pioneered modern dance in Finland. Refusing to take her aunt's suggestion, Gripenberg's choice soon led to other upper-class women such as
Irja Hagfors,
Hertta Idman,
Sara Jankelow, and others to become dancers and still others to enroll their children in her dance classes. Before she joined in a partnership with Onni Gabriel Snell in 1915, most of her performances were as a soloist or with her students. In 1912, she was portrayed along with her dance company in an oil painting by in Greek costumes. In 1914, she began teaching at the
Sibelius Academy simultaneously with her work at the National Theater. Throughout the 1910s and 1920s, Gripenberg toured with her dance company in the
Baltic states,
England, Sweden and in the United States. Her partnership with Onni, with whom she performed duets like
Bacchanale,
Pan and Nymph and
Two Gypsies, ended after a tour in the US in 1921, when he chose to remain there to dance. Gripenberg then occasionally danced with Kaarlo Eronen and . In 1918, she danced in
Georg af Klercker's film ''
(Nobel Prize Winner), which would be her only role on film. Increasingly she worked as a choreographer, completing over 100 dances throughout her career. Some of her most known works were choreographies for Orfeus'' (1926) based upon Gluck's
Orfeo ed Euridice,
Stormen (The Tempest, 1929) by Sibelius,
The Dybbuk by
S. Ansky (1934), and the
Topelius and
Melartin version of
Sleeping Beauty (1937). After 1932, Gripenberg focused exclusively on teaching and choreographic works, leaving performance to other artists. Her choreography, influenced by Duncan, took improvisation and developed it into modern dance, changing lyrical visualization into stylized geometric, strong movements. Musical rhythm, with smooth steps in which the toes were place on the floor and flexed before the heel touched the ground and controlled arms, which added to the overall design of the dance were hallmarks of her style. She won first prize for her choreography on small-group composition at the 1939 Brussels Concours International de Danse, with a 5-women ensemble performing
Gossip,
Percussion Instrument Étude and
Slavery. In 1945 she received third place for her
Life Continues at the Stockholm Les Archives Internationales de la Danse competition and in 1947, repeated the third prize for
Misguided, in the same competition held in Copenhagen. As a teacher, while continuing throughout her career at the National Theater and at Sibelius Academy until 1952, Gripenberg maintained a private studio. She also taught from 1934 to 1951 at the
Swedish Theatre, from 1938 to 1949 at the
University of Helsinki and at numerous summer camps and festivals. During summers, she taught abroad at venues in Denmark and Sweden. As a writer, she published critiques and articles on dance for newspapers and magazines, as well as her autobiography,
Rytmin lumoissa (Spellbound by Rhythm, 1950). Gripenberg's work was recognized by three medals from Finland. She received the participation medal for the War for Freedom, 1939/40 and was awarded the Pro Finlandia Medal of the
Order of the Lion of Finland in 1951. She was honored as a knight in the
Order of the White Rose in 1961. Having never married, Gripenberg retired with a friend to
Åland. ==Death and legacy==