Esther Diane Brimmer is an American foreign policy expert and former Assistant Secretary of State for International Organization Affairs. In June 2013, she left her post as Assistant Secretary and returned to academia.

The Atlantic Council is an American think tank in the field of international affairs, favoring Atlanticism, founded in 1961. It manages sixteen regional centers and functional programs related to international security and global economic prosperity. It is headquartered in Washington, D.C. It is a member of the Atlantic Treaty Association.