• Member of the Science Steering Committe (SSC) of the Core Project BAHC (Biospherical Aspects of the Hydrological Cycles of the IGBP (International Geosphere Biosphere Program).
• Chair of the Venezuelan Committe of the LBA project (The Large Scale Biosphere-Atmosphere Experiment in Amazonia).
• Chair of the Venezuelan Committe of the International Goesphere-Biosphere Program