Core Team
JASON STEINBERG
Jason Steinberg is the Founder and Executive Director of ISMP. After graduating from UNC Chapel Hill, he taught English and coached high school basketball in Pohnpei, Micronesia. When the team faced challenges accessing equipment and opportunities to play, Jason teamed up with his students to begin organizing and fundraising—and the seeds of ISMP were sown. More than a decade later, he continues to work alongside local partners around the world to expand opportunities for kids through sports and music. Jason lives in Brooklyn, New York, where he enjoys playing basketball, jamming with friends, attending concerts, and hiking.
ERIC BRANSE
Eric Branse joined ISMP in 2015 and serves as the Assistant Director. He currently lives in Boston where he works as a software consultant. He has a lifelong passion for sports and music and spends his free time running, devouring books and chess puzzles, and following Phish up and down the East Coast.
JONAH MAHRER
Jonah Mahrer is a management consultant living in Los Angeles. The rich history of sports and music in his family’s heritage brought him to ISMP. He is committed to his role as Development Director, and leads our development team. When he isn’t working to make meaningful connections for ISMP, Jonah is rooting for the UNC Tar Heels (his alma mater), scuba diving around the world, and jamming out to the Grateful Dead.
MICHAEL TOMMER
Michael Tommer is a graduate of UNC Chapel Hill who works in the sports and entertainment industry and serves in a Strategic Partnership role for ISMP. As a lifelong fan of all things sports and music, Michael was drawn to ISMP by the organization’s dedication to utilizing sports and music as tools for the growth and support of individuals in vulnerable communities throughout the world. Michael lives in New York, and in his spare time he enjoys playing and watching all sports, playing the drums, listening to podcasts, and reading.
Andy Rosen
Andy Rosen is a psychotherapist living in Brooklyn. Andy was involved in ISMP in many facets before joining the core team as the Development Coordinator. He’s a lifelong sports and music fan, whose experience as a youth basketball coach led him to ISMP. A UNC Chapel Hill alum, Andy spends his free time listening to music, watching movies, learning guitar, going to concerts, and watching Tottenham Hotspur.
KAtie Lipp
Katie is a Graphic Designer and Art Director from Los Angeles, where she currently lives and works. She received her undergraduate degree in Art + Technology and Art History from the University of Oregon's College of Design. Go Ducks! Her passions for design lie most fervently in brand management, communication design and digital illustration. She spends her personal time sketching, swimming and eating all the food. She frequents museums, dog parks and flea markets. Katie was connected to ISMP through her brother Jack, another core team member and quickly became committed to ISMP’s mission of bringing joy through sports and music to kids around the world.
SONIA CARBAJAL
Sonia joined the team in the spring of 2021, looking for a cause and a community to support after lots of time reflecting during the 2020-age of the pandemic! Sonia is a digital producer, originally from Seattle, who now calls Long Island home with her dog Molly. Music and sports have always been such a critical part of her life, a real passion that also helped guide her career. She looks forward to continuing the work with ISMP to give other kids those opportunities.