Professor of Astrophysics Columbia University

Professor, Columbia University and Flatiron Institute

Department of Physics & Astronomy, Montclair State University

Argonne National Laboratory and The University of Chicago

Professor of Theoretical Astrophysics, California Institute of Technology

Adjunct Professor of Physics, Georgia Institute of Technology

Heidelberg University

Los Alamos National Laboratory

Kavli Institute for Theoretical Physics

Assistant Professor of Physics at Montana State University