Professor Gordenker has carried on research and publication on institutionalized international relations, as well as his link with the University, even after his formal retirement.  This interest was rooted in wartime preparations for the formation of the United Nations and deepened by service in the UN secretariat, advanced study, and consulting. It continues on the vast global structure of practice and public law.

Among his recent work is The UN Secretary-General and Secretariat, 2nd ed. (2010); (with P.R. Baehr [in Dutch] 2010) a book examining if it were time to pension off the UN; Non-Governmental Organizations, the United Nations and Global Governance (with T.G.Weiss, 1996); and International Cooperation in Response to AIDS (with Roger Coates et al, 1995).

On the occasion of his retirement, colleagues and friends produced The United Nations in the World Political Economy: Essays in Honor of Leon Gordenker (David P. Forsythe, ed., London, 1989). He has twice been a Fellow of the Netherlands Institute for Advanced Study in the Humanities and Social Sciences; a Fulbright research professor at Leiden University (1984-85); a Senior Fellow at the Roosevelt Study Center; and a Fulbright Fellow at Science Po in Paris. He was also professor at the Graduate Institute of International Studies in Geneva; and at the University of the Witwatersrand. His research has also been sponsored by the Ford Foundation, the Rockefeller Foundation and the Social Science Research Council.

At Princeton, Professor Gordenker served as Director of the African Studies Program and as Director of Graduate Studies of the Department of Politics.