1990-1996 Assistant Research Scientist, Department of Astronomy, University of Maryland
1988-1990 Research Associate, Department of Astronomy, University of Maryland
1986-1988 Postdoctoral Fellow, Harvard-Smithsonian Center for Astrophysics
1985-1986 Herchel-Smith Scholar to Harvard
Research
X-ray astronomy
Gravitational wave astronomy
Computational and statistical methods
Projects
XSPEC development
Other HEAsoft development
Suzaku Science Working Group
Bayesian inference and Markov Chain Monte Carlo
Constellation-X Facility Science Team
Mock LISA Data Challenge
X-ray Astronomy Schools (COSPAR 2004, 4th International X-ray Astronomy School, 2005)