Barry Zwarenstein

CFO; Five9’s

Barry Zwarenstein has served as Five9’s Chief Financial Officer since January 2012 and was Five9’s Interim CEO from December 2017 to May 2018.

Mr. Zwarenstein was named the 2019 Bay Area CFO of the Year for the small to medium public company category.  

From November 2007 to October 2015, Mr. Zwarenstein served on the board of directors of Dealertrack Technologies, Inc., a provider of subscription-based software for the automotive retail industry that was acquired by Cox Automotive, Inc. From September 2008 to November 2011, Mr. Zwarenstein served as Senior Vice President and Chief Financial Officer of SMART Modular Technologies, Inc., a designer, manufacturer and supplier of electronic subsystems to original equipment manufacturers. From July 2004 through August 2008, Mr. Zwarenstein served as Chief Financial Officer of VeriFone Holdings, Inc., a provider of point-of-sale systems.From November 2001 to June 2004, Mr. Zwarenstein served as Chief Financial Officer of Iomega Corporation, a provider of storage and network security systems. From January 2001 to June 2001, Mr. Zwarenstein served as Vice President and Chief Financial Officer of Mellanox Technologies Ltd., a fabless semiconductor company. From October 1998 to December 2000, Mr. Zwarenstein served as Chief Financial Officer of Acuson Corporation, a medical ultrasound company that was acquired by Siemens AG in 2000. From July 1996 to September 1998, Mr. Zwarenstein served as Chief Financial Officer of Logitech International S.A., a provider of peripherals for computers and other digital platforms.

Mr. Zwarenstein holds a Bachelor of Commerce degree from the University of KwaZulu-Natal,South Africa, and an M.B.A. degree from the Wharton School at the University of Pennsylvania. He is qualified as a Chartered Accountant (South Africa).

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