1982 - He was a member of the U.S. delegation to the UNESCO World Conference on Cultural Policies.
1982 - He was a member of the Foreign Policy Association's Editorial Advisory Board.
1983 - He served on the U.S. delegation to the UNESCO-sponsored International Program for the Development of Communication.
1984 - He was a professor.
1985 - Weinstein was a founding member of the Board of Directors of the United States Institute of Peace and Chairman of its Education and Training Committeel.
- He was a Professor of History at Boston University.
1993 - He is Chairman of the Woodrow Wilson Presidential Library's Advisory Council. He chaired the annual "Global Panel" in the Netherlands.
- He was a founding officer of the Strasbourg-based International Institute for Democracy.
- He served as President of The Center for Democracy.