He has take a leave from his position as the International Director of Interreligious Affairs at the American Jewish Committee and Director of its Heilbrunn Institute for International Interreligious Understanding. He is a past chairman of the IJCIC, the International Jewish Committee on Interreligious Consultations, the broad-based coalition of Jewish organisations representing World Jewry to other religions.

Rabbi Rosen is an Honorary Advisor on Interfaith Relations to the Chief Rabbinate of Israel; serves on its Commission for Interreligious Dialogue and represents the Chief Rabbinate on the Council of Religious Institutions of the Holy Land.

He is Honorary President of the International Council of Christians and Jews (ICCJ) and serves on the Board of Directors of the King Abdullah bin Abdulaziz International Centre for Interreligious and Intercultural Dialogue (KAICIID).

Rabbi Rosen was a member of the Permanent Bilateral Commission of the State of Israel and the Holy See that negotiated the establishment of full diplomatic normalization of relations between the two. He has served as a member of the Advisory Committee of the World Congress of Imams and Rabbis and of the World Economic Forum’s C-100, a council of 100 leaders formed for the purpose of improving relations and cooperation between the Muslim and non-Muslim worlds.

In November 2005, he was made a papal Knight Commander of the Order of St Gregory the Great for his contribution to promoting Catholic-Jewish reconciliation and in 2010 was made a CBE (Commander of the British Empire) by H.M. Queen Elizabeth II for his contribution to interfaith relations.

In addition to honorary doctorates, Rabbi Rosen is the recipient of various awards including the Archbishop of Canterbury’s Hubert Walter Award for Reconciliation and Dialogue Cooperation, the Raphael Lemkin Award for Human Rights, the Search for Common Ground Award for Interfaith Dialogue, and the Festival of Faiths’ Lifetime Achievement Award.