Sonia Lee has enjoyed a diverse career in music as soloist, collaborative artist, director, educator, scholar, and arts administrator. Equally at home at the piano and various historical keyboards with a wide repertoire ranging from classical to contemporary to commercial to early music, she has performed in nearly 150 cities and towns on four continents, including festivals and venues such as the Rome Festival, Nordic Historical Keyboard Festival, Milwaukee Museum of the Pianoforte, Tagliavini Collection at San Colombano (Bologna), Handel and Hendrix (London), Taipei National Concert Hall, Olympus Hall (Seoul), and the early music festivals of Boston, Costa Rica, Hong Kong, and Utrecht. Her performances have been praised by critics as "masterly" (Aliénor News & Notes) and "full of elegance and expression" (Cleveland Classical). Her discography includes premiere recordings of works by Kozeluch, Weigl, and Bembo on the labels Arabesque, Mark Records, and LDM. She has been invited to serve as judge for many regional and international competitions, including the Calgary Performing Arts Piano Festival and the Gianni Gambi International Harpsichord Competition (Italy).

A past president of the Historical Keyboard Society of North America, Lee has directed the Collegium Musicum of the University of Illinois, and she has served as faculty and staff pianist at Illinois Wesleyan University, Scripps College, and the Joint Music Program of The Claremont Colleges. She is co-organist at Christ Church Parish, Ontario, CA, and interim editor of the peer-reviewed Early Keyboard Journal. She has recently been appointed as the director of the prestigious Jurow International Harpsichord Competition.