Marc Girondot received a PhD in Population Genetics and Evolution in 1993 at Université Pierre-and-Marie-Curie, Paris, France. His research focuses on the evolutionary and demographic dynamics of vertebrate populations, with a particular emphasis on temperature-dependent sex determination (TSD) in marine turtles. Combining fieldwork, long-term monitoring, and advanced modeling, he has contributed to understanding how environmental variability and climate change shape sex ratios, population viability, and life-history strategies. He has developed analytical and computational tools widely used in conservation biology, including models to estimate pivotal temperatures, reconstruct incubation regimes, and predict demographic consequences under future climates. Beyond his work on turtles, his interests span macroecology, evolutionary ecology, and the statistical analysis of ecological data. He has authored more than 200 scientific publications, supervised students, and collaborated internationally on conservation and ecological forecasting. He has been a full professor of Ecology and Evolution at the University of Paris-Saclay, France, since the year 2000.