Brian Grefenstette is a research scientist and instrument manager with 11 years of experience leading calibration, payload development, and mission science for high-energy astrophysics projects. Based in Pasadena, he currently manages the UVEX payload at Caltech while serving as NuSTAR Instrument Scientist, combining hands-on technical oversight with schedule and subcontract management. His background spans detector calibration, pipeline development, cross-calibration with major X-ray observatories, and building airborne and satellite instruments dating back to his Ph.D. work at UC Santa Cruz. He has led multiple NuSTAR teams (calibration, stray light, and targeted searches) and mentors early-career researchers, showing a rare mix of operational leadership and research productivity. Notably, he designed and flew the ADELE hard X-ray detector on a high-altitude research jet and produced early population studies of terrestrial gamma-ray flashes. He brings practical systems engineering to complex space missions while maintaining active scientific and technical stewardship.
11 years of coding experience
20 years of employment as a software developer
University of California Santa Cruz
B.S., Physics, B.S., Physics at Stanford University
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Brian Grefenstette - UVEX Payload Manager at Caltech