She performed as a soloist at the Christmas and the New Year's Concert in Carnegie Hall and at the Kennedy Center under the direction of Alexander Schneider in 1989. Appointed principal flute of the Bucheon Philharmonic Orchestra since 1992 until 2011 , one of the leading Philharmonic in Korea. Soyoung Lee has been the leading flutist of the nation, giving many concerts and broadcastings in Seoul. She also played with the Ensemble of Tokyo as a guest principal flute many times.
She recorded CD's with Sony, EMI Korea and Skarbo, and also performed as a soloist with I Solisti Veneti under the directionof Claudio Simone. In recent years, she performed solo recitals in the Tokyo University of Arts , in the Xian National Conservatory (China) and in Madrid (Conservatorio Superier di Musica), Nayang School of Arts (Singapore) , Kobe Asia Federation Congress (Japan). She has released 3 CD from french label Skarbo (of two are major concerti with the Ensemble of Tokyo and another solo album with piano).
Soyoung Lee has taught in several important Universities in Korea including Korea National University of Arts and Seoul National University . She is also the chairman of the flute department of Seoul International Summer Music Festival.
Recently, She has been on the jury members of many prestigious international competitions such as the 9th Kobe International Flute Competition, the 2nd Beijing-Nicolet International Flute Competition and the 7th Haifa International Flute Competition of Israel.
Now She teaches at Kunkook University, Seoul Arts Center , Seoul High school of arts and SCC.