LAWYER PROFILE

Oscar Tutasaura Castellanos

Latin America 2026

Posse Herrera Ruiz

Ranked in 1 practice area

Corporate/M&A

Colombia

10 years ranked

Contributions and articles

1 Articles, Press releases, highlights

About

Provided by Posse Herrera Ruiz

Latin America

Practice Areas

Compliance and Internal Investigations - Corporate Law - Insurance - Mergers & Acquisitions - White-collar Crime

Career

Oscar Tutasaura is a partner at Posse Herrera Ruiz. His professional practice focuses on corporate law, mergers and acquisitions, and privatizations.

Oscar’s experience in mergers and acquisitions includes advising buyers, sellers and public entities in domestic, international acquisitions and privatizations in a number of industries such as energy, pharmaceutical, infrastructure, fast food, chemical, automotive, and chain stores. Oscar has extensive experience advising clients on cross-border mergers and acquisitions in the insurance industry.

Prior to joining Herrera Ruiz, he worked as an associate at a Colombian firm and at the New York offices of Sidley Austin, LL.P. Óscar is a professor of law in obligations at the Faculty of Jurisprudence of the Universidad del Rosario.

He is a member of the New York State Bar and the New York City Bar.

Professional Memberships

International Bar Association (IBA) - Meritas - Interlaw

Chambers Review

Provided by Chambers

Chambers Latin America

Corporate/M&A - Colombia

Band 5

Individual Editorial

Oscar Tutasaura Castellanos retains his position in the rankings after eliciting endorsements from respondents for his expertise in Colombia's corporate market.

Learn more about this team View ranking table

Strengths

Provided by Chambers

Oscar Tutasaura Castellanos' practice stands out for his broad industry knowledge. He's always available, client-oriented and willing to seek alternatives to advance their businesses.
Corporate/M&AChambers Latin America