 He was also the first chairman of the university's department of computer science in 1995–99, and continued teaching there until 2008.He also served as president of the ethics committee of the Aristotle University in 1995, president of the university's international relations committee (1997–1998) and as vice-president of the research committee (1999–2004).In addition, in 1998–2004 he held the post of secretary for informatics and new technologies for the conservative New Democracy party, and was general secretary for research and technology at the Ministry of Development in the New Democracy cabinet from 2004 to 2008.