Stelios Tsilioukas graduated from the Department of Physics of the National and Kapodistrian University of Athens in 2004 and completed postgraduate studies in Naval Architecture and Marine Technology at the National Technical University of Athens in 2006, where he subsequently worked as a researcher. Since 2008, he has been a permanent secondary education teacher. He currently teaches Physics at the Model Junior High School of the Evangelical School of Smyrna, where he leads the Theoretical Physics Club for students. In 2021, he commenced his doctoral studies at the Department of Physics of the University of Thessaly under the supervision of IAASARS Research Director Emmanuel N. Saridakis, and in 2025 he was awarded his PhD. Since 2025, he has been a Postdoctoral Researcher at IAASARS under the supervision of Emmanuel N. Saridakis. International Collaborations: Laser Interferometer Space Antenna (LISA).

His research interests focus on relativity, cosmology, theories of gravity, dark energy, and dark matter.