Grey Sieczkiewicz is an Advisor at 64x Bio. Grey is currently the Chief IP Counsel at MPM BioImpact.

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At MPM BioImpact, he has been the IP strategy architect for more than 30 venture-backed life science companies across the spectrum—from nucleic acid therapeutics, oncology, neuroscience and protein engineering. Grey previously served as Vice President of Intellectual Property at Flagship Ventures, launching Moderna, Seres, Indigo Ag, and Syros. Earlier in his career, he practiced patent counseling and enforcement at national law firms Mintz Levin, Proskauer Rose and Foley Hoag. Grey is a member of the bar of the Commonwealth of Massachusetts and is admitted to practice before the U.S. Patent and Trademark Office. He is also the former President of the Boston Patent Law Association.

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Grey received his JD, magna cum laude, from Suffolk University Law School, his PhD in Cell, Molecular and Developmental Biology from Tufts University School of Medicine, and his AB in Biology from the College of the Holy Cross. He completed a postdoctoral fellowship at the National Cancer Institute.