Paul Klingenstein is founder and managing partner of Aberdare Ventures, a venture capital firm based in San Francisco. He started the firm in 1999 after a brief period as an advisor to the Rockefeller Foundation. Since then, the firm has invested in more than 50 companies, the majority of which are now public or have been merged into public companies. In the late 1990s, Klingenstein advised on private sector healthcare initiatives in India, China, and Malaysia; in the late 1970s he worked as a field biologist in Tanzania, Kenya, and Uganda. He has served on the boards of various educational and nonprofit institutions, including the African Wildlife Foundation, Juma Ventures (former Chair), the Marin Country Day School, and the Taft School. He is currently the Chairman of the Board of the International AIDS Vaccine Initiative, a global organization that supports science, clinical testing, advocacy, and policy in support of an HIV vaccine. Mr. Klingenstein is a member of the Audit Committee and the Investment Committee.