Distinguished Service Professor of Public Policy and Head of Heinz College in Washington, DC at Carnegie Mellon University Heinz College

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

History Professor at the University of South Carolina in Irmo, SC

National Security Professor at University of New Haven

Associate Director of Global Attitudes Research at Pew Research Center

Visiting Scholar in International and Public Affairs at Brown University, Watson Institute for International and Public Affairs

Professor of Government at Claremont McKenna College

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

President and CEO at U.S. Chamber of Commerce in Washington, DC

Adjunct Professor, Department of Microbiology & Immunology at Georgetown University, School of Medicine

Associate Professor of Clinical Medicine at UC Davis, School of Medicine

Assistant Professor of Internal Medicine, Division of Infectious Diseases at University of Michigan, School of Medicine

Professor of Infectious Diseases at University of Michigan, School of Medicine

Director - Georgetown COMPASS, Tenure Line - Professor (Infectious Diseases) at Georgetown University, School of Medicine

Director, Global Health Policy & Politics Initiative, Professor of Law & Assistant Professor of Global Health at Georgetown University, School of Medicine

Associate Professor of Molecular Biology & Microbiology at Tufts University, School of Medicine

Board Member at Doctors Without Borders

Astronomy at McDonald Observatory, University of Texas at Austin

Astronomy at McDonald Observatory, University of Texas at Austin

Astronomer at McDonald Observatory, University of Texas at Austin