 She taught mathematics, natural history, and geography at schools in Kokkola (1890–1891), Mariehamn (1895–1900), and Loviisa (1900–1943).She was active in a variety of roles in the community and society in Loviisa; she was a member of the town council from 1919 to 1923, and she became the chair of the town library board in 1930.Hammarström was known in particular as an author of children's books with nature themes.