Chang Sung is a Ph.D. candidate in Adult and Higher Education (EDAH) with an emphasis on Workforce Learning and Development of the Department of Educational Leadership and Policy Studies (ELPS), Jeannine Rainbolt College of Education (JRCoE). He received his bachelor’s degree in Education in 2011 and master’s degree in Educational Administration and Policy in 2013, both from Sungkyunkwan University, South Korea. Prior to beginning his doctoral journey at the University of Oklahoma, he got wide-range of research experiences while working at government-funded national institutes (Korea Research Institute for Vocational Education and Training, National Institute for Lifelong Education) and higher education institutions (Sungkyunkwan University, Hansung University) in South Korea. He participated in various research projects with respect to the studies on the educational reform process in vocational education, academic performance in higher education, and organizational performance in lifelong education. His major role was primarily focused on analyzing quantitative data and performing statistical analysis. His research interests center on adult education and human resource development policies, workplace learning and competency development of workforce, and work-to-school transitions of adult workers.