As a businessman, Paul Sack’s career has been in real estate-acquiring and managing properties for investors. In 1975, he founded The RREEF Funds to facilitate such investment by large pension funds. RREEF owned and managed $95 billion of real estate at its peak and was purchased by Deutsche Bank.
In 1966-67, Sack was country director of the Peace Corps program in Tanzania, comprised of 380 volunteers and a professional staff of 12. In 1968-69, he worked in Peace Corps/Washington as director of the Office of Planning, Programs and Research, which made the decisions as to which volunteer requests from overseas would be approved and thereby influenced the character of Peace Corps programs.
Returning to his home in San Francisco, he enrolled in the economics Ph.D. program at UC Berkeley, where he specialized in the economics and politics of development and secured his Ph.D. in political economy in 1975. He also holds an A.B. degree from Harvard College in economics and an MBA from the Harvard Business School.
Sack is an enthusiastic collector of photography and a former trustee of the San Francisco Museum of Modern Art and the Ansel Adams Center. He is currently a trustee of the Center for International Policy in Washington, DC, and is an active Emeritus Trustee of the San Francisco Art Institute.