Hye-Eun has been working as an assistant professor and a research scientist at the National Institute of Education (NIE), Nanyang Technological University in Singapore. At NIE, she taught pre-service teacher education courses at both undergraduate and graduate levels as well as in-service teacher education courses in physics teaching methods, assessment in science and science education research methods. Hye-Eun's research interests lie in the areas of conceptual development in science learners, interdisciplinary approaches in science (e.g. environmental education, STEM education, and multicultural education), affective factors in the science classroom, evaluation of pedagogical approaches, and diagnostic/formative assessment. Prior to joining NIE, Hye-Eun spent three years as a postdoctoral research fellow working with Professor David Treagust in the Science and Mathematics Education Centre (SMEC) of Curtin University of Technology in Perth and was funded by research grants from Dankook University in Korea and the Korean Research Foundation. Her experience at SMEC included teaching a graduate course in teaching and learning in science and mathematics and leading a colloquium in statistical analysis. She is serving as a co-editor of the Asia-Pacific Science Education Journal (Publisher: Springer) which will have its first publication in March 2015.