Professor Ioannis Vayas is the Director of the Institute of Steel Structures at the National Technical University of Athens (NTUA), Greece. He studied Civil Engineering at NTUA and graduated in 1976. He made his Phd Thesis at the Technical University of Braunschweig, Germany in 1981. Welding Engineer at the SLV Hannover, Germany 1980, honorary Doctor at the Technical University of Cluj-Napoca, Romania, 1997.

He is teaching and planning Steel and Composite Steel Structures and Bridges including strengthening and repair measures of existing structures. Author or co-author of 12 books in Greek, English and German. He has published around 200 papers in International Journals and Conferences. Participated in several Commissions and project teams for national Codes and Eurocodes 3 and 8.