Sung-A is a partner with De Martini & Yi, LLP. She has been specialized in insurance defense litigation and served as in-house counsel for private and commercial automobile insurance companies since 2003. She received her JD from Touro College, Jacob D. Fuchsberg Law Center, in 2002, where she served as an Editor-in-Chief for Journal of The Suffolk Academy of Law. She is fluent in Korean, and received BA in Political Science with minor in Education (Sociology) from Ewha Woman's University, Seoul, Korea. She was admitted to practice in New York in 2003. Sung-A joined De Martini & Yi, LLP as an associate in September 2015 and was promoted to partner in May 2019.