Dr. Christoforos Zoumas joined the former System Operator, DESMIE, in 2007. In 2014, he was appointed Director of Day-Ahead Market Operation at the former LAGIE S.A. and since August 2018, he holds the position of Director of Markets Operation at the Hellenic Energy Exchange S.A. During the past twelve years, he has been actively involved in key development projects for the Greek wholesale electricity market focusing both on the regulatory market design and on the development of market operation, clearing and settlement systems. He is presently involved in the implementation of the Day-Ahead, Intra-Day and Derivatives Markets of HEnEx. Dr. Zoumas is an Electrical and Computers Engineer holding a PhD degree from the Power Systems Lab. Aristotle University of Thessaloniki in power systems analysis and electricity markets.