Sotirios Mallios received his B.Sc. in Physics with an orientation in Electronics, Computers, Telecommunications and Control from the Department of Physics of the National and Kapodistrian University of Athens (NKUA) in 2005. In 2015 he earned his Ph.D in Electrical Engineering from the Electrical Engineering Department of the Pennsylvania State University, USA.

He worked as a Research Assistant at the Microwave and Optics Application Group at Physics Department of the National and Kapodistrian University of Athens (2001-2010), and at the Atmospheric Electrodynamics Group at the Electrical Engineering Department of the Pennsylvania State University (2010-2015). In 2019 he joined the Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing (IAASARS) of the National Observatory of Athens (NOA) to work as a Post-doc Researcher.

Atmospheric Electricity, Transient Luminous Events, Meteorology, Electromagnetic Theory, Fluid Dynamics, Plasma Physics, Numerical Modeling, Computational Physics.