My research lies at the intersection of physics, biology, and computational science, focused on problems such as: infectious disease dynamics and host-pathogen interactions; biological information processing; dynamics and cascades on networks; the structure and dynamics of intracellular networks involved in gene regulation, signal transduction, metabolism, development, virulence and immune response; and the design and development of software systems for modeling complex physical and biological phenomena.

• Adjunct Professor, Physics, Cornell University, 2010-present
• Senior Research Associate, Cornell Center for Advanced Computing, 2017-present
• Senior Research Associate, Institute of Biotechnology, Cornell University, 2007-2017
• Scientific Director, arXiv.org, 2014-2016
• Associate Director for Computational Life Sciences, Cornell Theory Center, 2006-2007
• Senior Research Associate, Cornell Theory Center, 1998-2007
• Senior Scientist, Beam Technologies, Inc., 1998
• Research Associate and Group Leader, Computational Science and Engineering Research Group, Cornell Theory Center, 1993-1997
• NSF/CISE Postdoctoral Research Associate in Computational Science and Engineering, Cornell Theory Center, 1993-1995
• Postdoctoral Research Associate, Institute for Theoretical Physics, University of California, Santa Barbara, 1991-1993
• Ph.D. in Physics, Cornell University, 1991
• B.A. in History, Yale University, 1984