Photo, Mathieu A. Wiener

Mathieu A. Wiener

Baker & McKenzie Zurich
Not admitted to practice law in this jurisdiction


Mathieu Wiener is an associate at Baker McKenzie in the International Tax and Global Wealth Management practice groups. Before joining the Firm, Mathieu worked in the United States Tax Court in Washington, DC.

After graduating from Georgetown University McDonough School of Business, magna cum laude, Mathieu graduated with a J.D. from UCLA School of Law, and an LL.M. in Taxation from Georgetown University Law Center. During law school, he worked in the United States Bankruptcy Court, Central District of California, and the U.S. Attorney for the Central District of California, Tax Division.

Mathieu is bilingual in French and English.

Practice Focus

Mathieu focuses his practice on the US aspects of international tax planning and cross-border transactions.

Professional Associations and Memberships

  • California Bar Association - Member


  • California~United States (2021)


  • Georgetown University Law Center (LL.M. Taxation) (2021)
  • UCLA School of Law (J.D.) (2020)
  • Georgetown University McDonough School of Business (B.S.) (2016)


  • English
  • French

Previous Offices

  • Geneva