QRTT’s musical excellence and versatility are apparent in their members’ professional resumes.  As an experienced orchestral and chamber music musician, first violinist Alexandr Kislitsyn performed for Presidents (Obama and many other leaders of Asian and European countries) and Royal Families, worked with the industry's most influential people and groups, appeared on The Tonight Show, starring Jimmy Fallon, and performed in notable venues including Carnegie Hall, Walt Disney Concert Hall, Kimmel Center, and Thailand Cultural Centre Hall, and many others. In addition, Alexandr is also a multi-genre electronic music producer and educator.

 Second violinist Aisha Dossumova is a prize winner of numerous competitions, including 1st prize in the International Violin Competition, "Shabyt", in Astana (Kazakhstan). She has participated in various international music festivals as a soloist and chamber musician and has performed in Disney Hall (Los Angeles), Kimmel Center (Philadelphia), Carnegie Zankel Hall (New York), and Eilat International Festival (Israel).

 Violist Kathryn Dark, a native of Haddonfield, NJ, began her musical studies on the violin at age nine and later switched to the viola at age twelve. She holds a Master of Music degree from the Shepherd School of Music at Rice University and two degrees from Northwestern University: a Bachelor of Music in viola performance and a Bachelor of Arts in psychology. She was a member of the Civic Orchestra of Chicago and performed with Yo-Yo Ma, Riccardo Muti, and Semyon Bychkov. Kathryn has toured more than 45 countries with the Lincoln Center Stage Piano Quintet onboard Holland America Line.

 Hailed by the New York Times for his “Fearless, and Ebullient” performances, cellist Alex Cox is one of the leading chamber musicians of his generation. Having founded the Omer Quartet at 18 years old and serving as cellist of the Thalea Quartet, he has performed internationally in the great concert halls of Europe and North America for the last 12 years. He earned his degrees at the Juilliard School, New England Conservatory, and Cleveland Institute of Music. He served as a fellow at Yale University and the University of Maryland College Park, where he taught chamber music studies. He’s garnered international prizes from the Young Concert Artist Auditions, the Trondheim International Chamber Music Competition, the Paolo Borciani Competition, and the Fischoff Chamber Music Competition. He currently serves as an artist and resident of the Fischoff Competition, where he co-directs an annual chamber music intensive.