As a founding member of the Thalea String Quartet, Christopher has performed recitals across North America, Europe, and China, and has appeared at Weill Hall at Carnegie Hall, the Kennedy Center, and Massey Hall. The quartet has shared the stage with members of the Emerson, Brentano, Kronos, and St Lawrence String Quartets, and they have performed alongside celebrated artists including Pulitzer Prize-winning composer Caroline Shaw, violist Lawrence Power, acclaimed Canadian band BADBADNOTGOOD, and visionary R+B artist Charlotte Day Wilson. The Thalea String Quartet was named the first string quartet-in-residence at the San Francisco Conservatory and served as the Doctoral Fellowship String Quartet at the University of Maryland from 2020-2023. From 2018-20, they were the Young Professional String Quartet at the University of Texas at Austin’s Butler School of Music, where they were mentored by the acclaimed Miró Quartet. They were named Associated Artists at the Queen Elisabeth Music Chapel for the 2018/19 season, where they are mentored by the Artemis Quartet.