Dr. Bridger has served as a member of the board of directors since May 2019. Dr. Bridger was also appointed to the board of directors of Expansion Therapeutics serving as an independent director as of January 2022. Dr. Bridger has served as a member of the board of directors of X4 Pharmaceuticals, Inc. since October 2018. From February 2015 to December 2017, Dr. Bridger served as a consultant to Xenon Pharmaceuticals Inc., a biopharmaceutical company, where he previously served as the Executive Vice President of Research and Development from January 2013 to February 2015. From October 2013 to October 2015, Dr. Bridger served as a Managing Director at Five Corners Capital Inc. From June 2010 to June 2012, Dr. Bridger served as a venture partner at Venture West Capital Management, a venture capital firm. From November 2006 to December 2007, Dr. Bridger served as Senior Vice President of Research and Development of Genzyme Corporation, a biotechnology company, which was acquired by Sanofi, S.A.