Ying Cai | Executive Director, Manufacturing Science and Technology
Ultragenyx Pharmaceutical Inc.

Ying Cai is the Executive Director of Manufacturing Science and Technology at Ultragenyx, where she leads technology transfer and process validation for AAV gene therapies. She also led Downstream Process Development and Formulation Development at Ultragenyx and served as the CMC lead for a clinical-phase program. With over 20 years of experience spanning early-stage product development to commercial launch, Ying has held various leadership roles at several biopharmaceutical companies, including Sanofi, Biogen, Merck, and two contract development and manufacturing organizations (CDMOs). She brings deep technical expertise across multiple modalities, including AAV, plasmid DNA, oligonucleotides, biosimilars, antibodies, antibody-drug conjugates, and fusion proteins. Ying holds a Ph.D. in Chemical Engineering from the University of Arkansas at Fayetteville and a B.S. in Biochemical Engineering from Zhejiang University in China.