In 1938, after her internship, Geisendorf moved to Sweden and was hired by Sven Ivar Lind, KFAI and Paul Hedqvist. In 1950 Geisendorf and her husband, Charles Edouard started their own office in Stockholm. She was known for creating the S:t Göran high school. She turned 100 in April 2014. Geisendorf died in Paris, France at the age of 101.