His recitals have taken him to Chicago, Jerusalem, Tel Aviv, St. Petersburg (Russia), New York, and his long-time home, Boston, among many other places.
His chamber music partners have included the Cleveland, Borromeo, and Brentano String Quartets, cellists Leonard Rose, Paul Katz, Laurence Lesser, Colin Carr, and Michael Kannen, and violinists Robert Mann, Roman Totenberg, James Buswell, Arnold Steinhardt and Eric Rosenblith.
One early review said: "Rosenbaum is one of those artists who make up for all the drudgery the habitual concert goer must endure in the hopes of finding the occasional, real right thing."
He has also held adjunct positions at Brandeis University and MIT, as well as teaching at the summer festivals mentioned above (see Pianist Career).
During his sixteen-year tenure as head of that school, the institution greatly expanded its educational scope and became a cultural center for the Boston/Cambridge community.
In 2022 he was appointed Visiting Professor of Piano and Chamber Music at National Taiwan Normal University in Taipei.