She became a Regents Professor at Lamar University, where she also served as President of the Faculty Senate.
In 1986–87, Dr. Hasselmo was one of 29 Fellows of the American Council on Education and spent the administrative internship year in the President's office at the College of William and Mary.
In 1992, Ann Die Hasselmo was appointed president of Hendrix College[3] where she served until 2001.
During her tenure as president of Hendrix, she served as chair of the board of directors of the National Association of Independent Colleges and Universities (NAICU)[3][4] and represented NAICU on the board of directors of the American Council on Education (ACE).
[7] In 2014, Hasselmo received the annual Distinguished Service Award from the Council of Independent Colleges and the Annual Distinguished Leadership and Service in Higher Education Award from the American Association of State Colleges and Universities.