[2] During his tenure, AJC became a global organization and began quiet engagement with countries in the Arab world, laying the groundwork for the Abraham Accords.

[3] In 1971, Harris worked as an English teacher in Moscow through a program with the American Field Service.

[9] Harris is a leading Jewish advocate[10][11][12] who meets with world leaders[13][14][15] to advance Israel's diplomatic standing and promote international human rights and inter-religious and inter-ethnic understanding.

On behalf of AJC, Harris has been involved in a number of humanitarian initiatives[25] in response to natural and man-made disasters, including in the Balkans, Middle East,[26] Africa, Asia, Latin America and the United States.

Harris has testified [27] before the United States Congress in both the House and the Senate on several occasions regarding the Middle East, NATO expansion, Russian[28] and Soviet affairs, and anti-Semitism, as well as before the United Nations Commission on Human Rights and the French Parliament.

In 2008, Harris spoke at the World Economic Forum in Davos at a plenary session entitled, "Faith and Modernization.