Z. C. Ioannidis was born in Didymoteicho, Greece, in 1981. He received the B.S. degree in Physics, in 2002, the M.S. degree in Electronics and Radio Engineering, in 2004, as well as the Ph.D. degree in Physical Sciences, in 2008, from the National and Kapodistrian University of Athens, Athens, Greece.

In 2002 he joined the Microwave and Optics Applications Group of the Physics Faculty at the National and Kapodistrian University of Athens as a Research Assistant. During 2008-09 he was occupied with National Service. Since 2009 he is a research associate at the Physics Faculty of the National and Kapodistrian University of Athens. He worked as an adjunct Lecturer at the Department of Electronics Engineering of the Technological Educational Institute of Piraeus from 2009 to 2015 as well as at the Department of Electronic Engineering Educators of the School of Pedagogical and Technological Education from 2011 to 2015.

In February 2016 he joined the Gyrotron Tests and Measurement Techniques Group of the Institute for Pulsed Power and Microwave Technology (ΙΗΜ) at the Karslruhe Institute of Technology (KIT), where he worked  in the development and testing of High-Power High-Frequency Gyrotrons.

Since 2021 he is an Assistant Professor at the Department of Aerospace Science and Technology of the National and Kapodistrian University of Athens. His research interests include high-power microwave generation, microwave pulse compression,  propagation and scattering of waves in plasmas, transmission lines and antennas.

Dr. Ioannidis is a member of the Hellenic Physical Society.