With this presentation, our new Professor of Environmental Geophysics, Prof. Dr. Sebastian Uhlemann, will introduce his research focus and areas of work. The presentation will take place on June 4, 2025 in the time slot of the Geo-Colloquium from 12:15 p.m. in the Geosciences lecture hall. We look forward to a lively participation from staff and students. Sebastian is interested in the near-surface subsurface, which is influenced by complex interactions between rock, soil, air, water and living organisms. He is interested in characterizing the properties of the subsurface and the processes that influence this zone in order to better understand phenomena related to geohazards, sustainable resource management and environmental protection. His research activities focus on terrestrial processes, especially those related to permafrost areas, landslides and groundwater resources. Current areas of work are in Alaska (permafrost, landslides), California (water resources, landslides) and Senegal (water resources). Sebastian uses integrated approaches that combine geoelectric and electromagnetic measurements both in the laboratory and in the field with remote sensing and physical modeling of the subsurface.