Yiyi Chen

Yiyi Chen is a seasoned biostatistics professional with extensive experience in both academia and the pharmaceutical industry. Recently, Yiyi served as Director of Biostatistics at Pfizer from December 2023 to June 2025 and previously held roles as Associate Director and Principal Biostatistician at Seagen from March 2021 to January 2024. Yiyi's academic background includes positions as Assistant Professor and Associate Professor at Oregon Health and Science University from September 2008 to March 2021, and as a Graduate Research Assistant at the University of Iowa from January 2004 to August 2007.