In 2001, after Rosenne was invited to teach his General Course on The Perplexities of Modern International Law, he became a member of the Hague Academy of International Law. He has also served as a consultant to various governments, including to the United States and Yugoslavia (in the Bosnian Genocide case) before the International Court of Justice (ICJ), and to Japan and Suriname in their Arbitrations in the ICSID and PCA respectively.