Prof. Dr. Punya Charusiri is Professor Emeritus in the Department of Geology, Faculty of Science, Chulalongkorn University, Thailand. He earned his Ph.D. in tectonics and geochronology from Victoria University of Wellington, New Zealand, in 1989. With over four decades of academic and research experience, he is recognized as one of Thailand’s leading geologists. His research expertise spans structural geology, tectonics, geochronology, igneous petrology, paleoseismology, geological mapping, and remote sensing. Prof. Charusiri has contributed extensively to the understanding of Southeast Asian tectonic evolution, with particular emphasis on active fault systems and the magmatic history of Thailand. He has published more than 190 scientific papers and has received over 4,600 citations (Google Scholar, 2025). He was named Thailand’s Outstanding Researcher by the National Research Council of Thailand in 2015. In addition to national recognition, he has engaged in numerous international collaborations, including geochronological and tectonic studies under the ASEA-UNINET program. His integrative approach, combining field-based geology with advanced analytical techniques, has significantly advanced the geological knowledge of mainland Southeast Asia.