Geoff is principal investigator for ECSP's "Navigating Peace: Forging New Water Partnerships" Initiative. He worked previously at Foreign Policy and the Council on Foreign Relations. He is an adjunct professor at the Monterey Institute of International Studies and has taught at the Georgetown University School of Foreign Service.
Geoff is co-editor, with Ken Conca of the University of Maryland, of Green Planet Blues: Environmental Politics from Stockholm to Johannesburg (3rd ed., 2004) and Environmental Peacemaking (2002). He is also editor of the annual Environmental Change and Security Program Report. He is a member of the United Nations Environment Programme’s Expert Advisory Group on Environment, Conflict, and Peacebuilding, co-vice chair of the Scientific Committee of the International Human Dimensions Programme on Global Environmental Change (IHDP), and an advisory board member of Screenscope's "Journey to Planet Earth" PBS documentary initiative. He is an editorial board member of Global Environmental Change and a board member of the Wilton Park USA Foundation. He is a former Term Member of the Council on Foreign Relations and the Washington Term Member Advisory Council.