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IFA USA Regions: Northern California
Northern California Region
The Northern California Region encompasses the following areas: CA-Northern California (Zip 94000-99999), NV-Nevada (Reno Area)

 

Regional Vice President
Julia Ushakova-Stein
Baker McKenzie LLP
jushakova-stein@fenwick.com
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Sonja Schiller
Google
sonjaschiller@google.com
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Julia Ushakova-Stein

Julia is a partner in our Firm's North America Tax Practice Group and is based in our San Francisco office. She advises on US international tax planning (inbound and outbound) and controversy matters. She represents clients from a diverse set of geographic areas and industries, including in the technology, healthcare, and financial services sectors. She has represented a number of Fortune 500 companies in US federal income tax matters and has successfully represented clients in federal tax controversies at all levels.

Julia has a passion for resolving complex tax issues, with a practical approach that considers her client's business needs. Clients value Julia's ability to explain complex tax issues in an easy to digest manner and her dispute prevention and risk mitigation insight. Julia's creative approach and technical experience is particularly valuable during tax controversy matters.

Chambers has recognized Julia, with clients stating that she is "very professional and has strong technical skills," "extremely knowledgeable and thoughtful in her support of our company," "comes well prepared," and “provides a great service.” Clients appreciate that her "communication style is calm and clear."

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Julia has been teaching international tax at UC Berkeley School of Law and in the Master’s Program at San José State University. Also, Julia has been an author of a monthly column in Tax Notes on international tax developments and regularly speaks at major tax conferences for professional tax groups, including for the International Fiscal Association, International Tax Review (ITR), Pacific Rim Tax Institute, and Euromoney. Julia is also the co-president of the Northern California region for the International Fiscal Association.

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Sonja Schiller

Sonja Schiller is a Regulatory Litigation Counsel at Google based in Mountain View, California. Previously, Sonja was a Global Tax Controversy Lead at Netflix and also held positions at Microsoft, Skadden, Arps, Slate, Meagher & Flom, Baker McKenzie, National Immigrant Justice Center, Art Institute of Chicago, Public International Law & Policy Group, American Civil Liberties Union, Washington University in St Louis School of Law, King & Wood Mallesons, Koreh LA, In-Asia.

Regional Council
Stephen Bates,
EY
Teresa Chen
Workday Inc.
Erik Christenson
Baker McKenzie
Yuliya Kuzovkova
Intel
Michael Liu
KPMG
Juliana Marques
Airbnb Inc.
Sarita Mohapatra
PwC
Larissa Neumann
Fenwick & West LLP
Upcoming Events
Joint IFA/TEI Atlanta Region International Tax Seminar
Thursday, October 23, 2025
IFA USA New York Region/ITI Conference
Tuesday, October 28, 2025
Procopio International Tax Institute 20th Anniversary Conference
Wednesday, October 29, 2025
IFA USA New England Regional Event: Meta-Tronic-Go: Update on Recent Transfer Pricing Decisions
Thursday, October 30, 2025
IFA USA Pacific Northwest Region Event
Thursday, October 30, 2025

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