Won Sik Shin is a Professor of Environmental Engineering at Kyungpook National University, specializing in environmental remediation, water and wastewater treatment, and contaminant fate and transport. He has held progressive academic and research leadership roles, including department chair, endowed research professor, institute director, and president of a national professional society, while also contributing as a visiting scholar and consultant. His research focuses on adsorption, advanced oxidation processes, radioactive and heavy metal wastewater treatment, soil and sediment remediation, and engineered functional materials, resulting in a substantial body of high-impact publications in leading chemical and environmental engineering journals. He has led multidisciplinary research projects addressing industrial, nuclear, and emerging pollutant challenges with practical engineering solutions. His professional recognition includes leadership appointments, service to national and international scientific societies, and active membership in major professional organizations, reflecting sustained excellence and influence in environmental engineering research and practice, with a research record comprising 127 publications, 3,868 citations, and an h-index of 32.