Prof. Dr. rer. nat. Sebastian Bauer heads the Geohydromodelling working group at Kiel University’s Institute of Geosciences. He studied Physics in Heidelberg, then completed his doctoral degree and postdoctoral qualification in Quantitative Geosciences at the University of Tübingen. He and his working group focus on the quantification and mathematical-numerical simulation of thermal, hydraulic, mechanical and geochemical processes in subsurface geology. For this, suitable software tools and numerical tools are developed and applied in practice to a wide range of topics. For the past 8 years, the working group has been conducting intensive research into underground energy storage in the form of gas storage for methane, hydrogen and compressed air in porous formations as well as subsurface high-temperature heat storage in the form of Borehole Thermal Energy Storage systems, Aquifer Thermal Energy Storage systems and technical underground storage options. He also coordinates the ANGUS research project (www.angus-projekt.de).