Astronomy at McDonald Observatory, University of Texas at Austin

Astronomer at McDonald Observatory, University of Texas at Austin

Member of the Board at Harvard Belfer Center for Science and International Affairs

Professor, Arizona State University, School of Earth and Space Exploration in Phoenix, AZ

Astronomer at McDonald Observatory, University of Texas at Austin

Astronomer, Research Associate at McDonald Observatory, University of Texas at Austin

Astronomer at McDonald Observatory, University of Texas at Austin

Professor of Political Science at Rice University

International Relations Professor & Director, Liechtenstein Institute on Self-Determination at Princeton University

Senior Fellow, Atlantic Council’s Europe Center in Washington, DC

Nonresident Senior Fellow in Carnegie’s Nuclear Policy Program at Carnegie Endowment for International Peace

Associate Professor of Medicine, Division of Infectious Diseases at University of North Carolina CH, School of Medicine

Professor of Global Health at Boston University, School of Medicine

Professor or Microbiology and Infectious Diseases at Boston University, School of Medicine

Professor & Chief, Division of Infectious Diseases at University of North Carolina CH, School of Medicine

Board Member at Doctors Without Borders