 She was professor of music at Dartmouth College 1979–2018, leading ensembles and teaching courses in conducting, vocal literature, Berlioz and Brahms, and music theory.In 2016 and 2017 O'Neal taught choral literature courses for conducting graduate students at Indiana University.She was visiting professor at Towson University (MD) 2005, Indiana University 1999, and University of Georgia 1996-97.