American violinist Erin Keefe, who became concertmaster of the Minnesota Orchestra in September 2011, has established a reputation as an artist who combines exhilarating temperament and fierce integrity. At Sommerfest 2012 she made her concerto solo debut with the Orchestra, performing Beethoven’s Violin Concerto. She has since been featured as soloist in two concertos by Mendelssohn—the Violin Concerto and, in May 2022, the Double Concerto for Violin, Piano and Orchestra—as well as the violin concertos of Brahms and Kurt Weill, and Dvořák’s Romance for Violin and Orchestra. In February 2023, she performed Leonard Bernstein’s Serenade, after Plato's "Symposium," for Solo Violin, Strings, Harp and Percussion. Keefe joined the violin faculty at the Curtis Institute of Music in 2022.

Winner of an Avery Fisher Career Grant, the Pro Musicis International Award as well as numerous international competitions, she has appeared as soloist in recent seasons with the Minnesota Orchestra, New Mexico Symphony, New York City Ballet Orchestra, Korean Symphony Orchestra, Amadeus Chamber Orchestra, Turku Philharmonic, Sendai Philharmonic and the Gottingen Symphony and has given recitals throughout the United States, Austria, Italy, Germany, Korea, Poland, Finland, Japan and Denmark.

Among the leading chamber musicians of her generation, Keefe has been an Artist of The Chamber Music Society of Lincoln Center since 2010 after previously being a member of The Bowers Program (CMS Two) from 2006 to 2009. She has been featured on “Live from Lincoln Center” three times with the Society, performing works by Brahms, Schoenberg, Bach and Corelli. Keefe is a member of Accordo, a string ensemble composed of present and former principal string players of the Saint Paul Chamber Orchestra and Minnesota Orchestra and has performed frequently with the Brooklyn and Boston Chamber Music Societies.

Keefe has collaborated with many leading artists of today including the Emerson String Quartet, Edgar Meyer, Gary Hoffman, David Finckel, Wu Han, Richard Goode, Roberto and Andrés Díaz, Menahem Pressler, Gary Graffman, Leon Fleisher, James Ehnes and Augustin Hadelich. Her recording credits include Schoenberg's Second String Quartet with Ida Kavafian, Paul Neubauer, Fred Sherry, and Jennifer Welch-Babidge for Robert Craft and the Naxos Label, recordings of the Dvořák Terzetto and the Schumann, Dvořák and Mendelssohn’s third Piano Quartet in E-flat with Paul Neubauer, David Finckel and Wu Han for the CMS Studio Recordings label as well as live performances of the Bartok Contrasts, Dvořák Piano Quintet, Mozart E-flat Piano Quartet, Respighi’s Il Tramonto and Haydn’s Arianna a Naxos recorded for Deutsche Grammophon with Menahem Pressler, Gary Hoffman, Ani Kavafian and Ewa Podles. She has also released a solo CD including works by Mendelssohn, Schumann, Ravel, Sibelius, Lutoslawski and Hindemith recorded with pianist Anna Polonsky. Her festival appearances have included the Marlboro Music Festival, Music@Menlo, La Jolla Summerfest, Mainly Mozart, Music Academy of the West, Music from Angel Fire, Ravinia and the Seattle, OK Mozart, Mimir, Bravo! Vail Valley, Colorado College, Skaneateles, Salt Bay, Music in the Vineyards and Bridgehampton Chamber Music Festivals.

As a guest concertmaster, Keefe has appeared in recent seasons with the New York Philharmonic, Pittsburgh Symphony, Seoul Philharmonic and the Sao Paulo Symphony Orchestra.

A native of Northampton, Massachusetts, Keefe earned a master of music degree from the Juilliard School and a bachelor of music degree from the Curtis Institute of Music. Her teachers included Ronald Copes, Ida Kavafian, Arnold Steinhardt, Philip Setzer, Philipp Naegele, Brian Lewis and Teri Einfeldt.

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, 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.