Hello and Welcome

I am Program Director for Astronomy at the National Science Foundation, and an Astrophysicist at the Harvard-Smithsonian Center for Astrophysics. My main research interests are X-ray and multiwavelength observations of outflows from supermassive black holes. At NSF, I am responsible for several major grants programs as well as the oversight of certain Federally Funded Research and Development Centers.

Latest Work

  • Black HolesFind out how I study black holes...
  • NSFFind out more about NSF and AST...
  • STEMNSF's latest education initiatives...

What’s New


At Gemini, Mauna Kea! 13,800 ft.


Work begins at NSF! Can't wait to get started.