Nancy Muirhead is corporate secretary of the Rockefeller Brothers Fund. Most recently, she served as assistant secretary and program director for the South Africa portion of the RBF's Pivotal Place program. From 1990–2001, she also led the Fund's work to strengthen the nonprofit sector in Central and Eastern Europe. 

Ms. Muirhead was one of the founding co-chairs of the steering committee of the Africa Grantmakers’ Affinity Group, a Tides Center project, and was a member of the executive committee of the Africa Grantmakers’ Affinity Group until 2009. She is a member of the board of Infinite Family, an NGO that uses technology to create supportive relationships between mentors and Southern African children affected by HIV/AIDS and poverty; the Nonprofit Enterprise and Self-Sustainability Team (NESsT), which works to solve cultural social problems in emerging market concerns by developing and supporting enterprises; and Play Soccer, a grassroots educational program for children and youth in six African countries that promotes their health, physical, and social development through sport. She is on the steering committees of the U.S. International Grantmakers Group. She has previously served on the steering committees of the Coalition for Children Affected by HIV/AIDS as well as the International Committee and the Treasury Guidelines Working Group of the Council on Foundations.

Prior to joining the Fund in 1989, Ms. Muirhead practiced law at Fox, Horan, & Camerini, a firm in New York City specializing in international commercial transactions in Europe and Latin America. Ms. Muirhead holds a doctor of jurisprudence degree from New York University School of Law and a bachelor of arts degree in international affairs and French civilization from Brown University.