A truly passionate and dedicated teacher, Fellenberg has taught, coached, and mentored students of all ages and abilities on four continents. His private students have gained entrance into major conservatories, universities, and summer music festivals, including the Oberlin Conservatory and the Brevard Music Center and have been recognized at the local and national level. Fellenberg is currently on the faculty at the Church Street School for Music & Art and the Brooklyn Center for the Musical Arts, where he accompanies and judges their semi-annual competition. He has directed the piano program at the Rappahannock Summer Music Camp from 2008-2011, where he also taught numerous courses in music theory, history, conducting, and collaborative piano and has also coached at the precollege division of the Manhattan School of Music. He is the President/Artistic Director of the New Jersey Young Artist Piano Competition.
In addition to offering private piano lessons, Fellenberg regularly coaches instrumentalists, singers, and pianists in his home studio in Manhattan.
This summer 2013, Fellenberg will return to the Music Academy of the West as a collaborative piano fellow. Additionally, he will spend two weeks giving masterclasses in Shenyang, China and will tour Oregon in a series of solo and piano ensemble recitals.
Fellenberg has studied at the Manhattan School of Music, the Oberlin Conservatory, and The Juilliard School. His principal teachers include Jonathan Feldman, Margo Garrett, Philip Highfill, James Howsmon, and Arkady Aronov. His early studies were with Denise Bastanza and the late May Eng.