He has served as a director at biotech companies, including Novalon Pharmaceutical Corp. (1996-2000), Cell Genesys, Inc. (2001–09), CV Therapeutics, Inc. (2005-2009), Vical, Inc. (2015-2019) and MeiraGTx, Ltd (2015-); and he served on the board of directors of the pharmaceutical company, Merck and Co. (2001–12).
He has held director positions at biotech companies including Novalon Pharmaceutical Corp. (1996-2000), Cell Genesys, Inc. (2001–09), CV Therapeutics, Inc. (2005-2009), Vical, Inc. (2015-2019) and MeiraGTx, Ltd (2015); he also served on the board of directors for Merck and Co. (2001–12).