He has been active in seeking justice against former Communist officials and members of the Communist-era secret police (Avo (HU), KGB (Soviet Union), Securitate (RO), Stasi (DDR), StB (CSSR), SB Security Service (Poland) inter alia.

He has sought to honor those who stood up against communism in Central and Eastern Europe, such as Jan Zajíc[4] and Václav Havel.

[5] Besides his work in Central and Eastern Europe, Ellenbogen also rescued the daughter of former Rwandan Foreign Minister (1979-1989) François Ngarukiyintwali to Canada after the revolution.

[13] He is also a member of the board of directors of the CERGE-EI Foundation (New York, USA),[1] a Senior Associate at the Moynihan Institute of Global Affairs, Maxwell School of Citizenship and Public Affairs (Syracuse, USA), and an Associate Fellow and Professor at the International Institute for Advanced Studies in Systems Research and Cybernetics (Windsor, Canada).

[1] He is a Patron of the right-of-center Henry Jackson Society[15] and a member of the Corps Rheno-Nicaria zu Mannheim und Heidelberg.