Seong graduated from Chung-Ang University in South Korea and has a bachelor's degree from Parsons School of Design in New York City.
[1] Combining both Asian and Western styles, she created her own fashion brand "Lea Seong" in Shanghai in 2008.
[3] Seong has worked at Calvin Klein in New York to becoming the first foreign member of the China Fashion Designers Association.
[5] Incorporating milk fabric into her designs, she made her debut in South Korea with her women's wear collection at the Pret-a-Porter Busan in late November, 2009.
[6] Her achievement has upgraded her as the Officer of Korea Model Association for International Cultural Cooperation.