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Christine A. Tsingos. Ms. Tsingos has served as a member of the board of directors since May 2021. From 2002 until her retirement in April 2019, Ms. Tsingos served as the Executive Vice President and Chief Financial Officer of Bio-Rad Laboratories, Inc. Prior to 2002, Ms. Tsingos held executive positions at Autodesk, Inc., The Cooper Companies, Inc. and Attest Systems, Inc. Ms. Tsingos also serves on the board of directors of Envista Holdings, Inc., Onto Innovation Inc. (formerly Nanometrics Incorporated) and Varex Imaging Corporation. Ms. Tsingos earned her B.A. in International Studies from the American University in Washington D.C. and an M.B.A in International Business from the George Washington University.