A native of South Korea, Sun Ah Choi began piano studies at the age of four, and continued her musical studies at the Seoul Arts High School in Seoul. She received her Master of Music degree in piano performance from the Manhattan School of Music, as a student of Marc Silverman. She earned her doctorate degree in classical piano performance at Mason Gross School of Arts, Rutgers, New Jersey State University, as a student of Daniel Epstein Dr. Choi was the winner of the Korean Piano Association Competition, and was also awarded Second Prize in the Teenager Competition. In the U.S.A., she was the winner of the Special Presentation Award of the Artists International Competition. In addition, she performed in the Sin Choon Music Concert of the Sejong Cultural Center, the Sin Youn Joo Ja Music Concert of the Seoul Arts Center, and in a concert for the Korean Piano Association at the Ewon Cultural Center and Ewha Womans University.
As an active soloist and collaborative pianist, she has performed in many solo and chamber recitals in U.S.A., including her Carnegie Hall recital debut in New York City. She has also performed solo recitals at Greenfield Hall, Baisley Powell Elebash Recital Hall, Schare Hall at Rutgers University, and so on. She has participated in the masterclasses of Lazar Berman, and Yong Hi Moon. Furthermore, she has served as a judge and an accompanist for music competitions. In addition to performing, she has previously taught at Hunter College of City University of New York as an adjunct professor and is currently working as an adjunct professor and accompanist at Long Island University (C. W. Post). She is also an accompanist for Metropolitan Youth Orchestra.