Landis MacKellar brings extensive research and editorial experience to the Population Council. Before joining the Council as senior associate and co-editor of Population and Development Review in 2013, he was editor-in-chief of the international journal Population and Environment, co-author of the Cambridge University Press volume Population and Climate Change, and lead author on population of the Pacific Northwest National Laboratory study Human Choice and Climate Change.
MacKellar led the International Institute for Applied Systems Analysis Health and Global Change Project, which provided policy advice on pandemic influenza, international health aid, and urban health issues. He has served as executive director of the International Union for the Scientific Study of Population, as well as chair of the International Council for Science Planning Group, "Health and Wellbeing in the Changing Urban Environment."
MacKellar has worked extensively in scientific studies on economic, technological, and social issues involved in global change. An expert on technical and political aspects of pension and social protection reform, MacKellar was previously engaged in policy advisory work in Armenia and India for the United States Agency for International Development (USAID) and the Asian Development Bank (ADB). He received both his master's in demography and PhD in regional science from the University of Pennsylvania.