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Jae-Sung Choi is a Sales Director at ASML Korea, having previously served as a Marketing Manager at ASML from 2010 to 2014. Before joining ASML, Jae-Sung worked as a Principal Engineer at SK hynix from 1998 to 2010. Jae-Sung earned a Doctor of Philosophy (PhD) in Chemistry from 서강대학교, where they studied from 1987 to 1996.