John D. Mayfield

John D. Mayfield joined Flagship Pioneering in 2024 as Senior Vice President of Business Development & Strategy. In this role, John leverages his expertise in licensing, transactions, and establishing strategic collaborations within the biotechnology, pharmaceutical, and diagnostics industries to head business development efforts for Flagship companies.

Before joining Flagship, John was the Chief Business Officer at Be Biopharma, building out the BD function, leading partnering efforts, and exploring technologies to empower the platform. John also held roles at EQRx where he was most recently the VP, Corporate and Business Development, leading a team that executed significant deal-flow spanning co-development and co-commercialization partnerships to licensing and collaboration agreements for preclinical, clinical and, commercial-stage medicines. John also held business development roles of increasing responsibility at Voyager Therapeutics and Foundation Medicine and was a member of the development teams at Foundation Medicine and Illumina. John has served as an advisory board member of the University of Florida Innovate | Accelerate since 2021 and TGEN Enterprise Directed Programs since 2023.

John holds a Ph.D. in Cellular and Molecular Biology from the University of Florida, and a Bachelor of Science in biology from Southeast Missouri State University. He conducted postdoctoral research at the Washington University School of Medicine in St. Louis and Duke University.