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Joanne Siu


Joanne Siu

B.A. Economics Yale College M.P.P. Kennedy School of Government - Harvard University J.D. UC Berkeley School of Law

Head of Tax

Gilead Sciences, Inc.

333 Lakeside Drive, Building 309

Foster City, California 94404


650.522.4784 OFFICE

415.816.9828 MOBILE

Professional Organizations

California Bar Association


Tax professional with 20+ years of progressive experience from Big 4 to law firm to industry. Track record of building and managing a global team through upgrading talent as well as development of team members. Effective collaborator and business partner with finance and other business functions in developing and implementing Finance initiatives. Current responsibilities include management of the worldwide corporate tax function.

Company Profile

Gilead Sciences is a biopharmaceutical company that discovers, develops and commercializes innovative therapeutics in areas of unmet medical need. Gilead’s mission is to advance the care of patients suffering from life-threatening diseases worldwide. Headquartered in Foster City, California, Gilead has over 8,000 employees with operations in North America, Europe, Asia Pacific and Latin America.