Roberto Díaz with the Poiesis Quartet

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—as well as Edison Denisov, Jennifer Higdon, Ricardo Lorenz, Bright Sheng, and Roberto Sierra. His recording of Jennifer Higdon’s Viola Concerto won the Grammy for Best Contemporary Classical Composition in 2018.

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 as 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.

Mr. Díaz’s recordings on the Naxos label with pianist Robert Koenig include the complete works for viola and piano by Henri Vieuxtemps and a Grammy-nominated disc of viola transcriptions by William Primrose. Also on Naxos are Brahms sonatas with pianist Jeremy Denk and Jonathan Leshnoff’s Double Concerto with violinist Charles Wetherbee and the Iris Chamber Orchestra led by Michael Stern. Mr. Díaz’s live performance of Jacob Druckman’s Viola Concerto with Wolfgang Sawallisch and the Philadelphia Orchestra is available on New World Records. He has also recorded the Walton Viola Concerto with William Boughton and the New Haven Symphony for Nimbus Records, and works for viola and orchestra by Peter Lieberson with Scott Yoo and the Odense Symphony Orchestra and for Bridge Records.

Since founding Curtis on Tour in 2007, Mr. Díaz has taken this successful initiative to North and South America, Europe, and Asia, performing chamber music side-by-side with Curtis students and other faculty and alumni of the school. His tenure as president of Curtis has also seen the construction of a significant new building which doubled the size of the school’s campus; the introduction of a classical guitar department and new conducting and string quartet programs; and the launch of Curtis Summerfest, summer courses open to the public. In the fall of 2013 Curtis became the first classical music conservatory to offer free online classes through Coursera.

Also under Mr. Díaz’s leadership, Curtis has developed lasting collaborations with other music and arts institutions in Philadelphia and throughout the world and established a dynamic social entrepreneurship curriculum, supported by a prestigious Advancement Grant from The Pew Center for Arts & Heritage. Designed to develop the entrepreneurial and advocacy skills of young musicians, this curriculum includes the project-based Community Artist Program (CAP) and the post-graduate Community Artist Fellowship program, which gives recent Curtis graduates the opportunity to dedicate a year of arts-based service to the community.

Mr. Díaz received an honorary doctorate from Bowdoin College and was awarded an honorary membership by the National Board of the American Viola Society. In 2013 he became a member of the prestigious American Philosophical Society founded by Benjamin Franklin. As a member of the Philadelphia Orchestra, he was selected by then-music director Christoph Eschenbach to receive the C. Hartman Kuhn Award, given annually to “the member of the Philadelphia Orchestra who has shown ability and enterprise of such character as to enhance the standards and the reputation of the Philadelphia Orchestra.” He received a bachelor’s degree from the New England Conservatory of Music, where he studied with Burton Fine; and a diploma from the Curtis Institute of Music, where his teacher was his predecessor at the Philadelphia Orchestra, Joseph de Pasquale. Mr. Díaz also holds a degree in industrial design.

In addition to his decade-long tenure as principal viola of the Philadelphia Orchestra, where he performed the entire standard viola concerto repertoire and gave a number of Philadelphia Orchestra premieres, Mr. Díaz was principal viola of the National Symphony under Mstislav Rostropovich, a member of the Boston Symphony under Seiji Ozawa, and a member of the Minnesota Orchestra under Sir Neville Marriner. He plays the ex-Primrose Amati viola.

Celebrated for their “multifaceted artistry” and “brilliantly idiomatic” programming (New York Times), the Poiesis Quartet is the winner of the 2026 Cleveland Quartet Award and the First Prize and Commission Prize recipients of the 2025 Banff International String Quartet Competition. In 2023, they were also named the Grand Prize and Lift Every Voice Prize winners of the Fischoff National Chamber Music Competition, as well as Gold Medal and BIPOC Prize winners at the 2023 St. Paul String Quartet Competition. In May 2024, Poiesis joined the Concert Artists Guild roster for North American management as winners of the Louis and Susan Meisel Competition.

Derived from ancient Greek (ποιεῖν), the word Poiesis means “to make”; specifically, to create something that has never existed before. With a focus on expanding the string quartet repertoire with vibrant new works by emerging composers, the Poiesis Quartet infuses each performance with unique moments of synchronicity and verve. Their 2024 debut album ‘as we are’ on the Bright Shiny Things label, which features world premiere recordings with mezzo-soprano Nancy Maultsby, was lauded for the quartet’s “bottomless depth” (Cleveland Classical). Having had presented several world premieres of works by composers including Brian Raphael Nabors, Kitty Brazelton, and Cara Haxo, their commission of String Quartet No. 7 ‘Surfacing’ by Chinese-Canadian composer Kevin Lau received its world premiere at the Chautauqua Institution in 2025. Furthermore, the Oberlin Commission Project (TOCP), an exciting new endeavor spearheaded by Poiesis, presents the world premieres of five newly commissioned works by LGBTQ+ composers of color from Oberlin Conservatory in March 2026. Most recently, Poiesis and the Caramoor Center commissioned and gave the world premiere of Jeff Scott’s Tapestry of the Beloved Beatified, honoring four queer revolutionaries.

Poiesis is honored to be selected as the 2025-26 Ernst Stiefl Quartet-in-Residence at the Caramoor Center for Music and the Arts, and as the 2025 St. Lawrence Emerging String Quartet in Residence at Stanford University, Poiesis has also previously acted as ensemble-in-residence of concertnova, a Cincinnati-based collective which presents multi-sensorial and interdisciplinary concert experiences. Recent and upcoming engagements include the San Antonio Chamber Music Society, Newport Classical, Chamber Music Raleigh, Noe Music, Guarneri Hall, and the Austin Chamber Music Center, amongst others. Highlights of the 2025-26 season include performances of ‘Absolute Jest’ with the Dayton Philharmonic in Dayton, OH and with the Oberlin Orchestra in Oberlin, OH. Poiesis has completed multiple international residencies in Punta del Diablo and Punta del Este, Uruguay; the Emilia Romagna Festival in Italy; the Lunenburg Academy of Music Performance in Nova Scotia, CAN; the University of Victoria in British Columbia, CAN; and the Festival d’Aix-en-Provence in France. Additionally, the Poiesis was selected as the only North American ensemble to compete in the prestigious 2025 Banff International String Quartet Competition in Alberta, CAN.

The Poiesis Quartet is currently the Graduate Quartet-in-Residence at the University of Cincinnati College-Conservatory of Music (CCM) studying under the Ariel Quartet. As graduates of Oberlin College & Conservatory, they were previously mentored by Sibbi Bernhardsson of the Pacifica Quartet and members of the Verona Quartet. As a multi-faceted ensemble, in addition to their performance degrees from Oberlin, members of the quartet also individually received formal education in disciplines such as chemistry, comparative American studies, feminist studies, baroque, and jazz. When not playing chamber music, Poiesis loves to learn new languages, share ice cream cakes, and take long walks on the beach.