sentences:  In addition to his athletic career, in 1990 he completed his studies at the National Technical University of Athens (NTUA) at the School of Chemical Engineering.In 2000 he received his doctorate from the National Technical University of Athens (NTUA) in the field of operational research.In December 2003 he began his academic career at the Laboratory of Industrial & Energy Economics at the School of Chemical Engineering of the NTUA, and today he is associate professor.