To maximize its outreach, WIIS encourages the creation of U.S. Chapters and International Affiliates. Chapters and Affiliates enhance WIIS's efforts to advance the leadership and professional development of women in the field of international security. WIIS Chapters and Affiliates operate independently but in close contact with WIIS Global. Currently, WIIS has a network of nine U.S. Chapters and 25 International Affiliates.
The WIIS Chapters and International Affiliates operate independently, but under the guidance of WIIS Global, to fulfill the mission of WIIS, promoting and advocating for women leaders in the international peace and security field with their programming and activities. Legally, U.S. Chapters work as part of WIIS Global.
WIIS has members- women and men -in 47 countries and on six continents. WIIS members work in international organizations, government, NGOs, think tanks, universities, corporations, and media outlets around the world.