István Gábor Hatvani is a senior research fellow of Paleoklíma 2ka Lendület Research Group at the HUN-REN Geological and Geochemistry Institute of the Research Centre for Astronomy and Earth Sciences, as well as a lecturer at the undergraduate and doctoral programmes of the Faculty of Natural Sciences of Eötvös Loránd University. Concentrating on the background of past climate change processes, he focuses primarily on the geostatistical and spectral analysis of geochemical and paleoclimate data series, but also performs spatial and temporal sampling frequency optimization and comprehensive assessment of surface and groundwater bodies. He is a member of the editorial board of Open Geosciences, Central European Geology and the International Journal on Geomathematics. He is a Board member of the Geomathematics and Informatics Section of the Hungarian Geological Society and Secretary of the Geological Committee of the Hungarian Academy of Sciences. He is also a member of the International Geomathematical Society (IAMG).

István Hatvani is convinced that in the coming years, there will be a growing demand for making the ever-increasing amount of research data freely accessible in a unified structure, not merely as supplements to studies. For this to be realized on a domestic platform (e.g., within the framework of the ARP project), it is necessary for researchers' expectations and requests to reach the developers even in the final phases of development so that the repository being created can meet researchers' needs as much as possible. In co-operation with Dániel Erdélyi, he plans to deposit three significant datasets in the ARP repository: (1) decade-long time series of stable isotope data of Lake Balaton, (2) geochemical composition data tables of groundwater and surface waters from the O-WATCH project, and (3) cosmogenic isotope measurement data from Macedonia for quantifying surface development processes. István and Dániel work with joint commitment and expertise to promote the free accessibility of scientific data and the realization of Open Science principles.