Gennard has performed with Gotham Chamber Opera, Virginia Opera, New York Festival of Song, The Glimmerglass Festival, Alba Music Festival, Knoxville Opera, Opera in the Heights, Central City Opera, New York Grand Opera, Lyric Opera of the North, Fargo-Moorhead Opera, The Hollywood Film Orchestra, and others. His understanding of vocal pedagogy and its application is supported by college level teaching in outstanding music programs including Yale University, Stephen F. Austin State University, Fairfield University, Maryville College, and Pellissippi State Technical College.