Dimitrios Kelesis received his diploma from the Dept. of Electrical and Computer Engineering of National Technical University of Athens (NTUA) in 2020. He completed his diploma thesis related to the CosmicWeb collaborating with researchers from NTUA, National Observatory of Athens and European University of Cyprus. He is currently pursuing his PhD at National Technical University of Athens, while working as a research associate at NCSR Demokritos. During academic years he focused on algorithms and mathematics. He was contributing solutions to a mathematical column of the European Mathematical Society’s Newsletter. He has also participated in many software development competitions and on the same time he was an active volunteer in many events. During school years he consecutive excelled in national and international mathematical competitions. His main area of interest is around Graph Neural Networks, Graph Theory and Representational Learning.