Ioannis Varvaris’ area of expertise is water flow and solute transport modeling in the vadose zone. He obtained his first Degree in Mineral Resources Engineering in 2010 at Technical University of Crete (Greece) and his second Degree in Civil Engineering in 2013 at Cyprus University of Technology. Moreover, he has completed a Master’s in Hydrogeology and Environmental Geoscience at the Georg-August University (Germany). During his Ph.D. in the Department of Agroecology – Soil Physics and Hydropedology at the Aarhus University, he developed hydrogeological models for simulating water flow and solute transport dynamics in agricultural fields and suggested concepts for the initial parameterization of non-equilibrium models by integrating visible−near-infrared spectroscopy and pedotransfer functions. As a Research Associate in the Department of Civil Engineering at the University of Wisconsin-Madison, he worked in extending the capabilities of MAGI, which is a modeling framework capable of dynamically simulating vegetation growth and nutrient cycling in response to environmental conditions while employing a physically based approach to quantify the movement of water and energy across the groundwater-unsaturated zone-vegetation continuum. His vision is to continue developing efficient hydrogeological tools for assisting targeted environmental impact studies utilizing all the necessary information through Earth Observation services.