Sergio Cerdeira-Estrada holds a B.Sc. in Physics, an M.Sc. in Physical Sciences, and a Ph.D. in Technical Sciences, with over 34 years of experience in Earth, Natural, and Environmental Sciences, specializing in marine research. His expertise spans marine optics, remote sensing, satellite oceanography, and geomatics. He coordinates the Marine and Coastal Information and Analysis System (SIMAR) at Mexico's National Commission for the Knowledge and Use of Biodiversity (CONABIO), where he conceived and leads the SIMAR Operational Explorer, an open-data platform integrating in situ measurements, satellite observations, and environmental models to deliver Early Warning Systems for coral bleaching, sargassum, harmful algal blooms, marine heatwaves, ocean acidification, and marine water quality. SIMAR is aligned with global networks and initiatives including MBON, GEO BON, the UN SDGs, and the Ocean Decade. He has authored 59 publications with over 1,500 citations and participated in 56 R&D projects. He is a professor in the Geography, Earth Sciences, and Marine Sciences graduate programs at UNAM. A member of TOS and IEEE-GRSS, he is a Level II National Researcher (SNI-SECIHTI). He serves on the Mexican Committee for the Ocean Decade, the SECIHTI Honorary Advisory Council for Sargassum, and represents Mexico before the Association of Caribbean States on sargassum matters.