LAWYER PROFILE
Guillermo A Lalanne

Guillermo A Lalanne

Latin America 2026

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Ranked in 1 practice area

About

Provided by O'Farrell

Practice Areas

Tax

Career

Guillermo Lalanne has been a Partner of the Tax Law Department since 2007. He joined the firm in 1999.

He is a lawyer graduated from the Law and Social Sciences School of Universidad de Buenos Aires. He is a Doctor of Law graduated from Universidad de Navarra, Spain. With his PhD thesis “Los beneficios tributarios a la inversión y el empleo en el derecho comparado -España, Italia y Francia”, he obtained the highest grade (outstanding cum laude) in 1996.

He undertook a Major Program in Corporate Law (Programa de Especialización Derecho de Empresa, PEDEM).

Professional Memberships

- Former President of the Board of Directors of the Argentine Fiscal Association (Asociación Argentina de Estudios Fiscales)

- Member of the Argentine Fiscal Association.

- Member of the International Fiscal Association.

- Member of the City of Buenos Aires Bar Association.

Personal

Professor of the Master’s Degree course in Tax Law at the Law School of Universidad Austral.

Professor of the Master’s Degree course in Tax Law at the Law School of Universidad Torcuato di Tella.

Professor of the Major in Tax Law Program at the Law School of Universidad Nacional de Córdoba.

Chambers Review

Provided by Chambers

Chambers Latin America

Tax - Argentina

Band 2
Band 2

Individual Editorial

Distinguished partner Guillermo Lalanne is noted for his expertise in contentious tax matters. He has extensive experience handling tax disputes of a constitutional nature.

Strengths

Provided by Chambers

  • Guillermo Lalanne's professional excellence is widely recognised in the market.

    TaxChambers Latin America

Ranked Individuals at O'Farrell (13)

Argentina

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