From September 2001 to December 2002 he was General Director of GRNET. He also acts as
an advisor to the Ministries of Development and Education on information and communication technologies.
From December 2002 to December 2004 he was Director of the managing authority of the Information Society Operational Programme.
In December 2004 he was appointed teaching assistant at the Network and Optimal Design Laboratory - NETMODE of the Department of Electrical & Computer Engineering of NTUA.
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