Paul is an AURA Scientist, specializing in imaging and spectroscopy of stellar populations of globular star clusters and early-type galaxies. He is currently an instrument scientist in the JWST/NIRISS team where he is the Operations Lead. He also leads the JWST Cross-Instrument Operations Working Group in the Instruments Division. Paul's earlier positions at STScI include Team Lead for the STIS instrument aboard HST (2001-2007) and IT Project Scientist (2007-2010). Paul's recent scientific interests include the nature of extended main sequence turnoffs in massive intermediate-age star clusters in the Magellanic Clouds, multiple stellar populations in globular clusters, and the assembly history and chemical evolution of early-type galaxies.


PhD in Astronomy, University of Amsterdam, The Netherlands
MS in Astronomy, Leiden University, The Netherlands


Science Interests:

  • Formation and  evolution of globular clusters
  • Nature of multiple stellar populations in globular clusters
  • Extended main sequence turn-offs (eMSTOs) in intermediate-age star clusters
  • Globular clusters as tools to understand galaxy evolution
  • Stellar  populations in (early-type)  galaxies
  • Nature of interstellar matter in early-type galaxies


Research Topics: Star Formation, Histories, and Evolution; Local Group Galaxies; Galaxy Formation and Evolution; Stellar Populations; Star Clusters; Resolved Stellar Populations; Astrochemistry, Chemical Abundances


Professional Websites:

Professional Website


ORCID ID: 0000-0002-5728-1427

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