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Jung H. Hah serves as the Chief Technology Officer and Head of the Global Tech Center at SK materials since September 2021. Previously, Jung held an advisory role at SK hynix from September 2020 to August 2021. Jung's extensive experience at Sumitomo Chemical spanned almost a decade, during which notable positions included General Manager of Global Marketing and R&D Coordinator and various roles focused on ArF photoresist from July 2011 to August 2020. Earlier in the career at Sumitomo Chemical, Jung contributed as a Senior Research Staff specializing in R&D for ArF photoresist from December 2007 to June 2011. Jung began professional endeavors at Samsung Electronics as a Senior Engineer and Engineer in photolithography and biochip technologies from January 2003 to October 2007. Academically, Jung H. Hah earned a Ph.D., Master's, and Bachelor's degree in Chemistry from the Korea Advanced Institute of Science and Technology between 1993 and 2003.