Theodore Steriotis holds a bachelor and a PhD degree in Chemistry (Physical Chemistry Laboratory, Chemistry Department, National & Kapodistrian University of Athens). His research interests lie in the field of porous materials, membranes (Inorganic – Polymeric) and nanocomposites for environmental, energy and health applications. In more detail he has long experience in the synthesis and mainly characterization of the materials above with sorption, diffusion, permeability/selectivity, (neutron & x-ray) scattering techniques as well as their combination. In terms of applications he is working in gas separations and storage (with specific interest in H2, CH4 and CO2) but also controlled delivery of substances. Beyond experimental techniques, a significant amount of effort has been devoted to molecular modeling approaches. Dr Steriotis is the head of MESL and runs the HYSORB lab, which has been funded as a European infrastructure for H2 storage measurements. He is an expert of the International Energy Agency, Hydrogen Technology Collaboration Programme, Task 40: Energy Storage and Conversion Based on Hydrogen. He is currently coordinating a National and a Horizon Europe project and is the scientific responsible for three National and one Horizon 2020 projects. He has co-authored more than 150 publications in books and peer reviewed scientific journals.