Heloise Brainerd was connected with the Pan American Union in Washington, D.C. from 1909 to 1935. In 1935 Brainerd became the chair of the Committee on the Americas, and chair of the Division of Inter-American Work, for the Women's International League for Peace and Freedom. Brainerd's goal was to draw women from Latin America into the peace movement, and to do this she traveled widely in the Americas. Brainerd was made Honorary Vice President of the U.S. Section of the WILPF in 1954.