Tanner is a longtime member of the American Jewish Committee's Board of Governors, and served the human relations organization as Chair of its Board of Trustees, Member of its Executive Committee, and from 2001 - 2004 as its President. In 2004-5 he served as Chairman of the Transatlantic Institute. From 2005-7 he served as Chairman of the Conference of Presidents of Major American Jewish Organizations. He also serves as a member on the Council on Foreign Relations.
- Transatlantic Institute
- Council on Foreign Relations
- Conference of Presidents of Major American Jewish Organizations
- Transatlantic Institute, Lifting the Arms Embargo on China: A Shift in EU Priorities?, Transatlantic Institute, Accessed 03-June-2009