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Ms. Walker has served as a director of the Company since November 2020 and has over 30 years of extensive finance experience in biopharmaceuticals, including in public biotechnology companies and technology companies. Ms. Walker currently serves as the Chief Accounting Officer of Prothena Corporation plc, a late-stage clinical company with expertise in protein dysregulation and a pipeline of novel investigational therapeutics focused on neurodegenerative and rare peripheral amyloid diseases and has held this position since 2013. Prior to joining Prothena, she was Vice President, Finance and Chief Accounting Officer of Affymax, Inc., a position she held from 2012 to 2013. From 2009 to 2012, Ms. Walker was Vice President, Finance and Corporate Controller at Amyris Inc. From 2006 to 2009, she was Vice President, Finance and Corporate Controller for CV Therapeutics, Inc. Ms. Walker also held senior financial leadership positions at Knight Ridder Digital, Accellion, Niku Corporation, Financial Engines, Inc. and NeoMagic Corporation. Ms. Walker also served as a director and Audit Committ Chair for LifeSci Acquisition Corp. (a publicly traded special purpose acquisition company) in 2020. Ms. Walker earned her B.S. in business from the California State Polytechnic University, San Luis Obispo, and is a certified public accountant (CPA).