Dr. Porterfield has portrayed such varied roles as Dorabella, Ottavia, Meg Page, Hansel, and Baba. She has sung with the Toledo Opera (OH), the Michigan Opera Theatre and the Ohio Light Opera.  Her staged repertoire also extends to the lighter vein, having performed comic roles in the operettas of Offenbach and Sullivan.

Equally as versatile within the concert repertoire, she sings regularly with chamber music groups and orchestras throughout North Carolina as well as the Midwest.  Her recent interest in the Anglo-American ballad and its influence on the Appalachian region resulted in a travel grant to sing a series of recitals in Great Britain.  She was invited to sing and lecture at the Elphinstone Institute of the University of Aberdeen in Aberdeen, Scotland.  A recipient of the Doctor of Musical Arts degree from the University of Michigan, she currently serves as a member of the voice faculty at Appalachian State University in Boone, North Carolina. 

Treble Choir is unique in that it is both a class and an ASU club, registered with the Center for Student Involvement and Leadership.  For this reason, Treble Choir is a fantastic ensemble to join.  Not only do we sing together, but we serve our campus and community while building a musical and social community within our own group.  We welcome all members of the University community, and the community at large.  Singers may take the class for 0 or 1 credit, and there is no audition. 

When openings are available, there are also opportunities to audition for Triple Trio, a nine-member ensemble within the Treble Choir.  Triple Trio rehearses twice weekly, on Mondays and Tuesdays from 6 - 7 p.m.  and can also be taken for 0 or 1 credit hour.  Triple Trio sings mostly a cappella music, and has the opportunity to entertain for a variety of functions throughout the semester, both on and off campus, as well as at the Treble Choir concerts.