Oleg S Pokrovsky graduated from Geochemistry department, Moscow State University, PhD in geochemistry (1994), entered CNRS (FRANCE) in 1999 and works over past decade on biogeochemistry of arctic and subarctic rivers and lakes. He is now a research director at the CNRS (FRANCE). He possesses both experimental physico-chemical, microbiological and geochemical expertise. Over past decade, O S Pokrovsky directed and co-directed 12 PhD students, 5 Post-doctoral research associates. Since 2000, O S Pokrovsky coordinated and leaded more than 20 various research grants, international cooperation programs and consortia, large-scale national (French) grants and served as important partner of a number of European (FP7) projects. Since 2013, O S Pokrovsky, a recipient of a prestigious Mega-grant of Russian Ministry of Science and Education (3 M $ for 3 years), directs BIO-GEO-CLIM Laboratory on Environment, Climate and Permafrost at Tomsk State University. O S Pokrovsky has strong academic records with ~160 papers peer reviewed papers and the same number of conference abstracts published since 1992 on physical chemistry, experimental geochemistry, and aquatic biogeochemistry; his HI factor is equal to 35 and the total citation number is close to 4000.