I am a Principal Staff Scientist (Science Support) working at the Space Telescope Science Institute (STScI). I work on calibrating the focal plane alignments of detectors for the James Webb Space Telescope (JWST). For my scientific research, I have been leading various projects to improve our understanding of how galaxies form and evolve in the Universe. My research has mostly focused on dynamical studies of stellar systems in the Local Group using high-precision "proper motion" measurements (astronomical term for sideways motions across the sky). The motions I try to measure are so tiny that the resolving powers of the Hubble Space Telescope (HST) and the JWST are essential. I have been PI/co-I for many successful HST proposals. I have also delivered several talks in recent meetings, and have been actively involved in numerous collaborations.

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About the Background Image: This background image of the Eagle Nebula (M16) was taken by myself at the Cerro Tololo Interamerican Observatory (CTIO) using the Mosaic II CCD camera in 3 narrow-band filters (Hα, OIII, and SII).