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Sonja Nelson has served as the Chief Financial Officer since June 2021 and as the Chief Operating Officer since October 2022. An experienced financial executive, Ms. Nelson joined Ambrx with 10 years of executive experience within the biotechnology industry. Most recently, she served as Chief Financial Officer at NantKwest, now ImmunityBio (NASDAQ:IBRX). Prior to NantKwest, Ms. Nelson was Vice President, Corporate Controller for AltheaDx. Previously, Ms. Nelson served as Corporate Controller at Cadence Pharmaceuticals (NASDAQ: CADX, which was acquired by Mallinckrodt plc). Ms. Nelson also served as Director, General Accounting at Cricket Communications, Inc. (acquired by AT&T) between 2008 and 2012. She started her career at KPMG and holds a bachelor’s degree in business administration with specialization in taxation and auditing from the University of Applied Sciences in Pforzheim, Germany. She is a Certified Public Accountant.