Russian geologist and scientific researcher. Doctor in Geology. Director of the Institute of Geodynamics and Geology, FCIAR RAS. Interests: geochemical and isotopic tracers in hydrogeological, geological, and geoecological studies; interactions between water and geological and chemical environments; quantitative understanding of chemically based processes in hydrogeochemical environments; equilibria of geochemical reactions; freshwater–seawater interactions in coastal aquifers; radiogenic and stable isotope geochemistry; groundwater dating.