From 1948 to 1949 she held an
NRC Postdoctoral Fellowship at
Copenhagen Observatory. In 1949, Underhill accepted a position as a research scientist at the
Dominion Astrophysical Observatory (DAO), in Victoria, where she worked until 1962. During this time she was a visiting professor at both
Harvard and
Princeton universities. While at Princeton she used their computing facilities to write software to model
stellar atmospheres. At the DAO she encountered sexism from her male PhD colleagues who limited her responsibilities while giving more to less qualified male coworkers. In 1962 she unexpectedly received a letter of offer from the
Utrecht University in the
Netherlands for the position of full professor in astrophysics. She was reluctant to leave Canada so the decision to take the job was not an easy one despite the mistreatment she had experienced by her colleagues. At the Utrecht University she lectured at the graduate level and published
The Early Type Stars. In 1970, she received a job offer arrived from
NASA's Goddard Space Flight Center where she worked until her retirement 15 years later. Anne Underhill in de bibliotheek van Sonnenborgh, Utrecht Observatory, 1962-1965.jpg|Anne Underhill in the library of Sonnenborgh, Utrecht Observatory, 1962-1965 Anne Barbara Underhill - Sinterklaasfeest Utrecht Observatory, 1967.jpg|Anne Underhill with colleagues and students at the annual Sinterklaas party, Utrecht Observatory, 1967 Anne Barbara Underhill - Zwarte Piet - Sinterklaasfeest Utrecht Observatory, 1967.jpg|Sinterklaas party. A
Zwarte Piet (a
black pete, a joker chimney sweep) presents Underhill with a surprise gift, Utrecht Observatory, 1967 B stars with and without emission lines, NASA SP-456 - cover, 1982.jpg|Anne Underhill and Vera Doazan: B stars with and without emission lines, NASA SP-456, 1982 ==Publications==