cellist – educator – Collaborator

Berrow Duo


Hailed as “hypnotic” and “engaging” by Cleveland Classical, Berrow Duo is the dynamic combination of flute and cello committed to the creation of new works. New York City-based performers Leia Slosberg, flute, and Thea Mesirow, cello, bonded over their desire to push traditional playing boundaries with the incorporation of text and extended techniques in instrumental music. Together, they focus on the promotion of women and femme-identified composers and artists to create new works through close collaboration. They have been presented by Montreal Contemporary Music Lab, the Cleveland Uncommon Sound Project, the 2018 Music Department Conference at NYU, the SENSE Concert Series in Baltimore, MD, and the Mise-En Place Curator Series. Their 2019/2020 season will include four premieres by Emily Praetorius, James Hamilton Lowrie, AJ Stillabower, and ZongYun We. Berrow Duo is passionate about experimentation, exploration, and the expansion of expression in instrumental music.  



Quartet121 is a New York City- and Philadelphia-based string quartet dedicated to the performance of new works. Molly Germer (violin), Julia Jung Un Suh (violin), Lena Vidulich (viola), and Thea Mesirow (cello) met while pursuing their master’s degrees in the Contemporary Performance Program (CPP) at Manhattan School of Music. In the quartet’s official first season they performed a program of contemporary repertoire at Tenri Cultural institute in NYC. Soon after, they performed at the CPP 10th Anniversary Alumni Showcase alongside critically acclaimed ensembles such as MIVOS Quartet, Loadbang, and TAK. They joined singer-songwriter Michelle Zauner in her project Japanese Breakfast for two sold-out shows at Brooklyn Steel, and performed portrait concerts of music by Matt Simon and James Diaz. In 2019 they will visit the Columbia University Music Department, University of Pennsylvania, and the Manhattan School of Music for performances and workshops, and travel to Canada as part of the BANFF Centre’s Evolution of the String Quartet summer festival.  

Actualizing Communities


Actualizing Communities, organized and to be performed by Thea Mesirow and Aaron Foster Breilyn, is a tour which attempts to demonstrate the effect that community, audience, and space have on the performance of contemporary music. The project includes the commissioning of four new pieces by Antoine Beuger (Dusseldorf), Jeff Brown (Berlin), Emmanuelle Waeckerle (London), and Aaron Foster Breilyn (NYC), and pieces by Eva Maria- Houben, Pauline Oliveros, and Reiko Füting. This program will be presented in the communities of each commissioned composer in cities throughout Europe between December 7th and 14th, 2019 as part of the Actualizing Communities Tour.​