[1] Vandamm participated in competitions of the Royal Photographic Society[4] and won awards at major exhibitions.
An article from October 1911 in Greater London Illustrated said of Vandamm that "She has not unjustly been called one of the Rembrandts of Modern Photography.
[4] In 1918, she married George Robert Thomas, an American engineer working for the British Air Board.
[1] Due to the unfavourable economic environment in England following the depression of 1920–1921, in 1923 Vandamm and her husband moved to New York where she found work with a magazine.
[9] She made connections there with Irene and Alice Lewisohn, photographing performers in the early modern dance and experimental music scenes associated with the Neighborhood Playhouse theatre.
[4] She created portraits of dance pioneers, including Martha Graham, Charles Weidman, and Doris Humphrey.
The guild's official photographer, Francis Bruguière, had been "erratic in the performance of his duties", and his work was eventually supplanted by Vandamm Studio.
She took photographs of groups of actors, depicting major moments in the plot, as well as stage crews, songwriting and production teams, and the finished sets.
[4] Vandamm photographed numerous celebrities during her career, including Katharine Hepburn, Tennessee Williams, Dorothy Parker, Marlon Brando, Harpo Marx, Gregory Peck, and Leonard Bernstein.
[6] Vandamm's photography was known for its technical quality, particularly her choice of camera angles and skilful use of shadow and light.
[1] Vandamm's archives, including her prints, key sheets, and negatives, were purchased for $73,000 by the New York Public Library in 1961, following her retirement.