In addition to his work with the quartet, he frequently performs with many of Boston’s finest orchestras and chamber ensembles, including the Boston Symphony Orchestra, Boston Pops, Emmanuel Music, the Boston Modern Orchestra Project, and Worcester Chamber Music Society. He has appeared as a guest artist with the Boston Symphony Chamber Players, Boston Musica Viva, Chameleon Arts Ensemble, and Radius Ensemble, and has performed at summer music festivals including Tanglewood, the Newport Music Festival, Third Dimension Chamber Music Festival, ArtsAlive Chamber Music Festival, Chamber Music Conference, and Kneisel Hall. Strongly devoted to the performance of new music, Berger has premiered countless new works with many of Boston’s new music ensembles, including Sound Icon, Collage New Music, Dinosaur Annex, Ludovico Ensemble, and ALEA III. He has recorded solo and chamber works for Albany, Bridge, Innova, and Immersive Music Project.

Berger is Associate Professor of the Practice at Brandeis University, where he has taught viola, chamber music, music theory, and analysis. In addition to his teaching at Brandeis, he frequently teaches analysis and orchestration courses for Boston University and coaches chamber music at the New England Conservatory and the annual Chamber Music Conference at Colgate.