Prof. Baptiste Pignon is a distinguished psychiatrist and researcher affiliated with the Department of Psychiatry, INSERM, Fondation FondaMental, Hopitaux Universitaires Henri Mondor, Creteil, France. His research primarily focuses on the intersections of psychiatry, environmental health, and public health epidemiology, with particular attention to the mental health impacts of climate change and environmental stressors. Prof. Pignon has made substantial contributions to the study of psychiatric emergencies, mood and psychotic disorders, and their associations with climatic variables such as temperature, air pollution, and green exposure. His interdisciplinary expertise integrates psychiatric epidemiology, biostatistics, and environmental psychology, enabling him to explore how external environmental determinants affect the onset, severity, and healthcare utilization patterns in mental illnesses. He has collaborated extensively with national and international research consortia, including the CONSTANCES cohort and the Fondation FondaMental network, fostering data-driven insights into mental health determinants across diverse populations. Prof. Pignon has authored and co-authored more than 131 scientific documents, including peer-reviewed journal articles, book chapters, and conference proceedings, reflecting his dedication to advancing psychiatric research. His scholarly impact is evidenced by an h-index of 21 and over 2,385 citations (as indexed in Scopus), marking him as one of the leading French researchers in the field of environmental psychiatry. His recent works have explored nuanced factors such as school holidays, thermal comfort indices, and contextual variables in understanding psychiatric outcomes related to extreme temperatures-addressing methodological limitations in prior global studies. Beyond his contributions to research, Prof. Pignon is also deeply involved in clinical practice and academic mentorship, guiding early-career psychiatrists and epidemiologists in methodological rigor and evidence-based approaches to mental health. His investigations-such as the case-crossover analyses of psychiatric emergencies in response to thermal variations-have provided critical implications for health policy, climate adaptation strategies, and mental health preparedness in urban and suburban contexts. Through his commitment to translational research, Prof. Baptiste Pignon continues to shape the understanding of how environmental and climatic stressors influence psychiatric morbidity and health system responses, bridging scientific inquiry and clinical application to improve patient outcomes and public resilience amid accelerating climate challenges.