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Darin Lee, Ph.D., has served as our Vice President, Technical Operations since November 2025. Dr. Lee has served in scientific and leadership roles at aTyr since joining the company in August 2011, including most recently as Sr. Director, Process Sciences. Dr. Lee has over 20 years of biopharmaceutical industry experience, with the majority focused on CMC, biologics development and manufacturing. Throughout his tenure at aTyr, he has provided leadership overseeing CDMO selection and management, process development, and cGMP manufacturing of drug substance and drug product to support the company’s early to late-stage clinical programs, including efzofitimod. He has authored and contributed to key regulatory documents, including IND/IMPD filings and responses to agency comments. Prior to joining aTyr, Dr. Lee held scientific roles at Ambrx, Inc., MannKind Corporation, and Cangene Corporation. Dr. Lee received a Ph.D. in Biochemistry from the University of Alberta and a B.Sc. in Biochemistry from Simon Fraser University. He is co-author or co-inventor on numerous publications and issued U.S. patents.