Balkrishan (Simba) Gill, Ph.D., served as the founding Executive Chair, and has served as President and Chief Executive Officer, and a member of the Board of Directors, since 2015. Simba has also served as a Venture Partner at Flagship Pioneering since 2015, and a member of the Board of Directors of Foghorn Therapeutics from 2017.

From 2016 to 2019, Simba served as a Director at Realm Therapeutics PLC. From 2006 to 2015, Simba served as the President and Chief Executive Officer of moksha8 Pharmaceuticals, Inc and as a Partner at TPG Growth. Prior to these roles, Simba was President and CFO at Maxygen from 1997 to 2006 and before that head of Corporate Development at Valentis and at Systemix. He worked at Boehringer Mannheim as co-head of Global Marketing for Recormon, Head of North Africa and Head of Corporate Development for the Elecsys Immunodiagnostic Platform.

Simba is an immunologist and received his Ph.D. for early work on antibody drug discovery development from King’s College, London based on work done at Celltech. He received his M.B.A. from INSEAD. He has lived and worked in many countries and locations across the US, Latin America, Europe, the Middle East, Asia, and Africa.