Violist Roberto Díaz continues a long and distinguished career as performer and educator. President and CEO of the Curtis Institute of Music since 2006, his tenure has seen the introduction of Curtis On Tour; the inception of classical guitar, string quartet, and conducting programs; the launch of Curtis Summerfest; and the debut of an online stage called Curtis Performs. Before his appointment at Curtis, he was principal violist of the Philadelphia Orchestra, where he performed the entire standard viola concerto repertoire and presented a number of Philadelphia Orchestra premieres. In demand as a soloist, he collaborates with leading conductors of our time, and has appeared with the symphony orchestras of Minnesota, Boston (at Tanglewood), Nashville, New World, Aspen, Grant Park, and Calgary, among others. He has also worked directly with important 20th- and 21st-century composers, including Krzysztof Penderecki, Edison Denisov, Roberto Sierra, and Jennifer Higdon. As a chamber musician, he has toured Europe, Asia, and the Americas as a member of the Díaz Trio with violinist Andrés Cárdenes and cellist Andrés Díaz. Among Mr. Díaz's numerous recordings are the complete works for viola and piano by Henri Vieuxtemps, a Grammy-nominated disc of viola transcriptions by William Primrose, and the Brahms sonatas with Jeremy Denk. Mr. Díaz plays the ex-Primrose Amati viola.