Kelly teaches college students at North Dakota State University and also maintains a private studio in Fargo, North Dakota. His students range in age from high school to professional (adult) singers. Many of Kelly's former and current students are professional musicians enjoying careers as performers in opera and musical theatre, K-12 and college/university educators, and music therapists. They work throughout the United States in markets such as Atlanta, Boston, Chicago, Dallas, Denver, Houston, Los Angeles, Nashville, New York City, and Salt Lake City.
Kelly is an assistant professor of voice and artistic director of NDSU Opera.