Jean Martins is Research Director at the CNRS (INSU). He led the TRANSPORE team of the Laboratoire d’étude des Transferts en Hydrologie et Environnement (LTHE) as well as the HyDRIMZ team of Institut des Géosciences de l’Environnement (IGE)de Grenoble UMR 5001 (CNRS, G-INP, IRD, UGA). He is editor of the journal Frontiers in Environmental Science, member of various reading committees and scientific committees (Ecodyn ECCO, Microbien EC2CO, Ecodyn EC2CO, Bioindicateurs of ADEME) and member of the Commission de Spécialistes Surfaces et Interfaces Continentales (CS SIC) of the INSU of the CNRS. It also carries out expert work with various local (commissions de l’eau, Régions, Zones Ateliers), national (Agence de l’eau, CNRS, INRA, ADEME) and international (CEFIPRA, CAPES-COFECUBŠ, H2020) bodies. His research area at the IGE focuses on the multidisciplinary study of the fate and impacts of natural or anthropogenic contaminants within the critical environmental zone composed of the air, water and soil compartments. He is particularly interested in the reactive transfer mechanisms of dissolved and particulate contaminants (colloids, (nano)particles, pathogenic or non-pathogenic bacteria, etc.) in soils, air and water. His work aims to better understand the functioning of this critical area and thus contribute to the development of solutions for the rehabilitation or remediation of polluted environments and to limit the human and ecological impacts of pollutants.