Olivier Thevoz

olivier@thevozpartners.com
T: +1 315.201.2230
W: https://thevozpartners.com/
New York, Austin, Honolulu, Lausanne

Olivier Thevoz is the founder of THEVOZ & Partners, a boutique law firm offering expertise in U.S. and international tax law. Bailey Duquette P.C. and THEVOZ & Partners share a unique alliance, folding THEVOZ & Partners' depth of tax law experience into Bailey Duquette P.C.'s corporate and dispute practice offerings. The two firms work seamlessly together to provide legal solutions to clients who live and work in a global financial market.

As the founding partner of THEVOZ & Partners, Olivier advises prominent European families and international groups on structuring and securing their investments in the United States. Olivier specializes in U.S. and international tax law, and is licensed to practice in New York, Texas, and Switzerland.  

His areas of expertise include:

  1. International tax planning (for corporations, individuals, and trusts)

  2. Transatlantic tax matters (residency, compliance, inheritance and wealth transfer)

  3. Tax audits, litigation, and administrative proceedings

  4. Structuring high-value cross-border investments and transactions

He also serves as a strategic legal and tax advisor to financial institutions, providing an integrated perspective on governance and international expansion. In addition, he is an active member of the Committee on Civil Practice Law and Rules of the New York Bar Association and the Committee on Tax of the Vaud Bar Association.

THEVOZ & Partners maintains offices in Switzerland (Lausanne) and the United States (New York, Austin, TX, and Honolulu). 

Education 

University of Texas School of Law (LL.M., Business Law)
University of Lausanne (Master of Law in Private Estate and Tax Law Litigation)
University of Lausanne (Bachelor of Law)
Swiss Certified Fiduciary Expert (Accounting and Tax Expert), Swiss Association of Accountants (2006)
Swiss Certified Accountant Agent, Swiss Expert Association for Audit, Tax, and Fiduciary (2003)

Bar Admission

New York
Texas
Switzerland (Vaud)

Publications

  • Aux Etats-Unis, ce sont les juges qui arbitrent la guerre des droits de douane (In the United States, it is the judges who arbitrate the tariff war), Journal Le Temps, March 17, 2026.

  • Estate tax planning for Swiss residents who own assets in the US - Swiss residents may be subject to US estate tax if they own US shares or real estate properties, Expert Focus 2023/2, p. 44 ss.

  • US tax implications for Swiss Residents investing in US stocks - US tax on dividends, capital gains and estate on US shares owing by Swiss residents, Expert Focus 2022/10, p. 477 ss. 

  • §1782(a) – Obtention des moyens de preuve aux Etats-Unis (“§1782(a) – Obtaining evidence in the United States”) Revue de l’Avocat FSA (Swiss Bar Association) 6/7 2022, p. 285 ss.

  • Analyse des défis pour la Suisse au regard du droit fiscal international - Les futurs défis qui attendent la Suisse après l’adoption de sa réforme fiscale de 2019 (Analysis of the challenges for Switzerland regarding international tax law. The future challenges for Switzerland after the adoption of 2019 tax reform), Expert Focus 2019/11, p. 885 ss.

  • Baisse d’impôts, un cadeau empoisonné pour les actionnaires américains? (Reduction of taxes, a poisoned gift for US shareholders?), Journal Le Temps, November 19, 2018.

  • Règles professionnelles applicables aux activités atypiques (Professional regulations on atypical activities), Revue de l’Avocat FSA (Swiss Bar Association) 10/18, p. 450 ss.

  • Transparence des personnes morales et publicité des participations. Conséquences pratiques liées aux obligations d’annonce des actionnaires (Transparency of legal entities and publicity of shareholdings. Practical consequences of shareholder reporting obligations), Expert Focus 2016/8, p. 574 ss.

Languages

English
French