A violist of international reputation, Roberto Díaz is president and CEO of the Curtis Institute of Music, following in the footsteps of renowned soloist/directors such as Josef Hofmann, Efrem Zimbalist, and Rudolf Serkin. As a teacher of viola at Curtis and former principal viola of the Philadelphia Orchestra, Mr. Díaz has already had a significant impact on American musical life and continues to do so in his dual roles as performer and educator. As a soloist, Mr. Díaz collaborates with leading conductors of our time on stages throughout North and South America, Europe, and Asia. He has also worked directly with important 20th- and 21st-century composers, including Krzysztof Penderecki, whose viola concerto he has performed many times with the composer on the podium and whose double concerto he premiered in the United States; and Edison Denisov who invited Mr. Díaz to Moscow to work on his viola concerto. Ricardo Lorenz, Roberto Sierra, and Jennifer Higdon have all written concerti for Mr. Díaz. As a frequent recitalist, Mr. Díaz enjoys collaborating with young pianists, bringing a fresh approach to the repertoire and providing invaluable opportunities to artists at the beginnings of their careers. In addition to performing with major string quartets and pianists in chamber music series and festivals worldwide, Mr. Díaz has toured Europe, Asia, and the Americas a member of the Díaz Trio with violinist Andrés Cárdenes and cellist Andrés Díaz. The Díaz Trio has recorded for the Artek and Dorian labels.