Oh Jung-Hee is an isuja (이수자) for Intangible Cultural Property No. 23 (kayagŭm sanjo and kayagŭm pyŏngch'ang), a title granted under the Republic of Korea's Cultural Properties Protection Act to an artist who has met all requirements for qualification as a potential successor to the National Living Treasure for a specific cultural property. Highly regarded as a traditional musician and kayagŭm performer, Oh has appeared frequently on KBS TV as well as in live concerts and music festivals throughout the United States and Asia. She also has taught p'ansori in Korea at Sangmyung University and Seoul Arts University, which she studied under the tutelage of the late Park Kui-Hee and Ahn Sook-Sun, two of Korea's National Living Treasures and poyuja (보 유자) or "holders" of Intangible Cultural Property No. 23. In addition, her teaching career has included stints at the Korean Music Association and the Han-So-Ri Music Institute. Currently, Oh is an artist-in-residence at the Donghwa Cultural Foundation in Englewood, New Jersey, where she teaches courses in p'ansori and kayagŭm.

Oh holds a BA in Korean folk music from Chungnam National University and an MA in Korean national music from Chung-Ang University. In 2004, she placed second in the Korean Music Association’s Jeonju National Competition.