Dr. Nadia Martínez-Villegas is a chemical engineer with an MSc in Chemical Engineering from the Autonomous University of San Luis Potosí, Mexico, and a PhD in Soil Sciences from The Pennsylvania State University, USA. She is an environmental (bio)(hydro)(geo)chemist specializing in the behavior, mobility, and risk assessment of potentially toxic elements in soil–water systems. She is currently a Full Professor in the Division of Applied Geosciences at IPICYT (Instituto Potosino de Investigación Científica y Tecnológica), San Luis Potosí, Mexico. Her research focuses on environmental geochemistry, particularly arsenic and trace metals in contaminated soils, sediments, urban dust, groundwater, and surface waters. Her work integrates field studies, laboratory experiments, geochemical modeling, and data-driven approaches to support environmental diagnosis, risk assessment, and decision-making in vulnerable and mining-impacted regions. Dr. Martínez-Villegas has published over 60 peer-reviewed articles and has supervised doctoral, master’s, and undergraduate students. She has led and contributed to more than 12 national and international research projects. She serves as an Editor for RSC Advances and previously served as an Associate Editor for RSOS. She was a former President of the National Institute of Geochemistry (INAGEQ), Mexico. She is the coordinator of the Arsenic Research and Action Network (ARAN) and a member of the Mexican Academy of Sciences.