He is a member of the Hellenic Parliament with the conservative New Democracy party since 2002.

He studied Electrical Engineering at the National Technical University of Athens.

D. Papathanassiou SA - Trading of technological equipment for buildings since December 31, 2002.

[2] He has been Member of the Board of Directors (1982–1988), Secretary General (1988–1993) and President (1994–2000) of the Athens Chamber of Commerce and Industry (ACCI).

In the period 1991-1992, he was advisor on energy issues, at the Minister of Commerce Industry and Energy and between 1992–1993, he has been vice-chairman of the Board of Directors of Public Gas Corporation (DEPA).