​Calla Ringgenberg is a graduate of Central Michigan University with a Masters Degree in Organ Performance, having studied under Dr. Steven Egler and Dr. Mary Lou Nowicki.  Calla is the recipient of a Graduate Assistant Grant from CMU, the Kent S. Dennis Scholarship for Organists sponsored by the American Guild of Organists, Saginaw Valley Chapter and the Richard Featheringham Organ Scholarship at CMU.  She received her Bachelor of Music Education Degree from Central Michigan University and is currently organist at Harrison UCC Congregational Church. Calla teaches a private piano studio in Clare, Michigan and is accompanist for vocal students in the Music Department at Central Michigan University. Calla is active in the American Guild of Organists, Saginaw Valley Chapter, serving as Sub Dean.