By the time Sung graduated from the Curtis Institute of Music with a bachelor"s degree, he had performed again with the Philadelphia Orchestra, toured extensively with the South Jersey Symphony Orchestra, and debuted with the Concerto Soloists Orchestra (currently known as the Chamber Orchestra of Philadelphia).
At the age of eight, he began private studies with Eleanor Sokoloff. Sung made his debut with the Philadelphia Orchestra three years later, performing the Mozart Piano Concerto in B-flat major, K. 456 with his own cadenza. In 1982, at the age of thirteen, Sung was admitted to the Curtis Institute of Music, where he continued his musical studies with Eleanor Sokoloff, Jorge Bolet and Seymour Lipkin.
During his final year of study, Sung started touring collaboratively with legendary violinist Aaron Rosand.
That partnership eventually led to his appointment as staff pianist at the Curtis Institute in 1993. Three years later, he was named Director of Instrumental Accompaniment, and then in 1998, Director of Student Recitals.
Sung has toured extensively in cities throughout the United States, Canada, South America, England, Japan, Brazil, and South of Korea. He has collaborated with renowned musicians such as Julius Baker, Jeffrey Khaner, Hilary Hahn and Leila Josefowicz, as well as contemporary composers such as Jennifer Higdon, Robert Maggio, and Harold Boatrite.
Sung has recorded for Naxos Records, Albany Records, Vox, Biddulph, I Virtuosi, Cryptography Research Inc, and Avie labels.
Sung has been an advocate for utilizing cutting-edge technologies to enhance the artistry of the classical musician. He developed a customized database to create a paperless office for his administrative work at Curtis. In 2002, shortly after the first Tablet Personal Computer"s were introduced by Microsoft to the public, Sung adapted an early model for use as a digital music score reader with a foot pedal-activated page turning system.
Currently, he is experimenting with live visualization techniques using programs such as Liquid Media and particle generators such as particleIllusion in a framework called the Visual Recital.
Most recently, He played piano demo songs for music software Pianoteq which utilizes advanced modelling techniques.