Born in Athens in 1967, Stephanos matriculated at the National Technical University of Athens – School of Civil Engineering in 1989 and graduated in 1995, with a degree in Hydraulic Engineering. He has attended a significant number of conferences and one-day seminars on water supply issues. Stephanos has been involved in constructing hydraulic studies and providing consulting services on technical hydraulics for various departments of state organisations. He has been a partner at ETME Peppas & Associates E.E. since 2000 and demonstrates knowledge of computers. Stephanos has very good knowledge of English.