BOARD & STAFF
Board of Directors
Linda Rappaport (Chair)
Jason Treuting
Laifun Chung
Mark DeChiazza
Robert Sirota
Tomo Matsuo
Kevin Clark
Johanan Ottensooser
STAFF
Felix Reyes - Operations Assistant

Born in Brentwood, New York, Felix Reyes is Operations Assistant for Sandbox Percussion, Managing Director of Pathos Trio and is a freelance chamber musician/percussionist living in Brooklyn, NY. As a performer he has performed all over the United States and has performed in several countries abroad, including Germany, Poland, Spain, Japan, Switzerland, and El Salvador.
Felix graduated with his Master’s in Percussion Performance from Bowling Green State University where he studied under the direction of marimba specialist Dr. Isabelle Huang. In furthering his specialization in keyboard percussion he’s also studied privately under marimba virtuosos Katarzyna Mycka, Ney Rosauro, and in 2016 received a Diploma in Marimba Performance at the Toho Gakuen School of Music in Sengawa, Japan, where he studied with marimba legend/virtuoso Keiko Abe.
Since then Felix has performed all across NYC in venues such as The DiMenna Center for Classical Music, Roulette Intermedium, National Sawdust, Kaufman Music Center, and had made his solo Lincoln Center and Carnegie Hall debuts in May 2018 alongside Swiss percussion soloist Fabian Ziegler, then Pathos Trio in May 2024. His current activities outside of Sandbox Percussion and Pathos Trio include working as Institutional Giving Manager for New York Live Arts, and working as a Development Manager/Grant Writer for various arts nonprofits in New York City.
Felix is a proud endorser of Adams Percussion instruments, Sabian Cymbals, Pearl Drums, and Vic Firth sticks and mallets.
Madeline Dethloff - Administrative Assistant
Maddy Dethloff is a percussionist and teacher based in western Massachusetts and the Hudson Valley. She is the percussion instructor at Mount Holyoke College in and at Deerfield Academy. She is also involved in the APS program at Bard College Conservatory of Music. Maddy has played with the Chatterbird New Music Ensemble, Roy Wooten’s New Village Orchestra, Pioneer Valley Symphony Orchestra, The Orchestra Now, and many others.
As a performer, Maddy was a winner of the Southern Adventist concerto competition and performed Séjourné’s vibraphone concerto with their orchestra in Collegedale, TN. She also performed Viet Cuong’s percussion concerto “Re(new)al” with the UMass Amherst Wind Symphony. In 2022, she performed “Castine” by Stuart Saunders Smith at the Roulette in Brooklyn, NY. In the fall of 2019, she and her colleague, Sam Carullo, organized and performed a duo concert to premiere five new works by composers from all over the country.
Internationally, Maddy has premiered music by Lila Meretzky with the marimba virtuoso, Ji Hye Jung, in Cortona, Italy. In South America, she performed in Colombia with Orquesta Colombo Americana de Vientos and, in Buenos Aires, with colleagues Ignacio Corrales and Ayano Kataoka at Centro Cultural Recoleta. She also presented a masterclass at the Conservatorio de Astor Piazzolla. In December of 2023 and Summer of 2024 Maddy has gone on tour with Grammy award winning composer Tan Dun playing in Hong Kong, and in Changsha, Qingdao, and Shanghai, China. She played the music of John Cage, as well as world premieres of Tan Dun’s arrangement of “Rite of Spring” and his new concerto for Nao Bells.
Active in her community, Maddy worked at her local New Horizons band, leading sectionals and participating in concerts with the senior citizens of Northampton, MA. From 2021-2024, Maddy has been involved with Yellow Barn, the summer fesitval in Putney, VT. Maddy has also worked for the Brooklyn-based percussion quartet Sandbox Percussion since 2019.
Maddy received her Bachelor’s at Vanderbilt University studying under the direction of Ji Hye Jung and Lee Vinson. She is an MM graduate from the University of Massachusetts Amherst where she studied under Ayano Kataoka.
Katherine Fortunato - Administrative Assistant
Praised for her “passion in every note” (Artburst Miami) and her “expressive, ferocious, and thrilling” performances (La Scena Musicale), Katherine Fortunato is a percussionist based in New York City who has made a name for herself as a lively and energetic performer unafraid of unorthodox collaborations.
Katherine enjoys a varied career as a freelancer and has performed and collaborated with Sandbox Percussion, Linda May Han Oh, Heartbeat Opera, Metropolis Ensemble, Mark DeChiazza, and Robert Sirota. Katherine has taken the stage at the Thalia Theater at Symphony Space, The Maverick, The Stone, The Irondale Center, The Dimenna Center, and other notable venues woven into the fabric of New York. In August of 2023, Katherine performed the North American premiere of Linda May Han Oh’s “Ephemeral Echoes” at The Stone in Manhattan. She made her debut in the New York opera scene as the percussionist on the world premiere of Noah K’s opera, Salvation, directed by Mark DeChiazza. Following this production, Katherine was the percussionist on the world premiere of Heartbeat Opera’s “THE EXTINCTIONIST”, a chamber opera by Daniel Schlosberg and librettist Amanda Quade that featured over 30 percussion instruments.
Katherine was the winner of the George and Elizabeth Gregory Concerto Competition and she performed Kevin Puts’ Marimba Concerto with the Mannes Orchestra in October of 2023. The following spring, Katherine performed Marimba Concerto with the Doctor’s Orchestral Society of New York. She kicked off 2025 with a performance of Christopher Cerrone’s In a Grove at PROTOTYPE Festival with Metropolis Ensemble, which later made the New York Time’s Best Classical Performances of 2025 list. She was also a featured percussionist in Heartbeat Opera’s arrangement of Salome, which was featured on The New York Time’s Best Classical Music of 2025, So Far.
Katherine received her bachelor’s degree from the Frost School of Music and her master’s degree from The New School. Katherine’s mentors have included Svet Stoyanov, Matthew Strauss, Sandbox Percussion, and Christopher Cerrone. Katherine is a teaching artist with the Little Orchestra Society, an artistic administrator for Sandbox Percussion, Digital Engagement and Production Associate for Metropolis Ensemble. She was the Percussion Coordinator at The New School from 2022 to 2026.
This season, Katherine will join Sandbox Percussion and Trinity Church’s award-winning new music ensemble, NOVUS, for two performances of Steve Reich’s Tehillim. She will perform the New York premiere of Philippe Manoury’s new work for percussion duo, Argumenta, with Kosuke Matsuda on their debut concert for their duo, format percussion. This season will also feature collaborations with pianist Piotr Kozłowski, Concurrent Duo, a solo recital at Metropolis Ensemble’s Rivington gallery, a solo tour in Miami, and a performance of Thomas Duffy’s marimba concerto Three Places in New Haven with the Cornell University Wind Symphony.

