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Theonie Anastassiadis


Theonie joined Flagship Pioneering after completing the firm’s Flagship Pioneering Fellowship. At Flagship, Theonie works as part of a team of entrepreneurial scientists to develop the science, intellectual property and business strategy that form the foundation of Flagship’s next breakthrough startups.

Before joining Flagship, Theonie completed her graduate studies at the Perelman School of Medicine at the University of Pennsylvania, where her research focused on replication fork dynamics in the context of cancer development and therapeutics. Theonie has received several awards and has been granted multiple fellowships for her academic work, including an NIH NRSA Predoctoral Fellowship. During her graduate studies, Theonie held multiple leadership positions on the Cancer Biology Graduate Program Executive Committee, Cell and Molecular Biology Course Curriculum Committee, and the Cancer Biology Graduate Program and Cancer Institute weekly seminar series. She also completed a Wharton Business Foundations Specialization and participated as a mentor at the yearly Larta Institute NIH CAP FeedForward Sessions.

Outside of her science and business interests, Theonie has promoted young professional engagement in the arts, serving as both president and donation chair of the Wilma Theater Young Friends committee.

Theonie holds a B.S. in biology with honors from Haverford College. She received her Ph.D. in cell and molecular biology with a focus in cancer biology from the Perelman School of Medicine at the University of Pennsylvania.