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Posse Herrera Ruiz

Work +57 1 325 7300
Fax +57 1 325 7313

Oscar Tutasaura

Work +57 – 1 3257300
Posse Herrera Ruiz

Work Department

M&A and Corporate Law


Oscar Tutasaura is a Partner at Posse Herrera Ruiz. His practice focuses on Corporate Law, Mergers and Acquisitions.


During his practice in Colombia and in the United States, he has advised several domestic and international companies in cross-border mergers and acquisitions, Rule 144A/Regulation S bond offerings and in the establishment and maintenance of ADR programs in the U. S. capital markets. Before joining Posse Herrera Ruiz, he worked as an associate in a local law firm and as Associate at the New York offices of Sidley Austin LL.P. He is a faculty member at Universidad del Rosario where he teaches Civil Law. Oscar received a J.D. from Universidad del Rosario, has post graduate studies in Commercial Law at Universidad de los Andes and received an LL.M. in International Legal Studies from Georgetown University. He is admitted to the practice in Colombia and in the State of New York.


His native language is Spanish and he is fluent in English.


• Georgetown University Law Center LL.M. in International Legal Studies, 2004 Washington, DC USA • Universidad de los Andes Graduate Degree in Commercial Law, 2003 Bogotá, Colombia • Universidad del Rosario J.D., 2002 Bogotá, Colombia


Corporate and M&A

Within: Leading individuals

Oscar Tutasaura - Posse Herrera Ruiz

Within: Corporate and M&A

A top choice in the area’, the 29-strong practice at Posse Herrera Ruiz provides strong multidisciplinary legal advice, especially in the M&A context, displaying ‘a very sophisticated knowledge of the local context’ and ‘excellent responsiveness and appropriateness of advice’. Oscar Tutasaura led the counsel to Lazard in the valuation, reorganization and $400m sale of Saludcoop’s strategic assets, including health insurance companies and healthcare institutions – notably Cafesalud EPS, the largest health insurer in Colombia covering 5.8 million individuals. Tutasaura and the much in-demand José Alejandro Torres, ‘a veteran advisor’ co-direct the firm’s compliance practice in addition to their transactional and general corporate activity. Jaime Cubillos, a ‘very strong M&A lawyer with solid knowledge about cross border M&A under Colombian and other key international jurisdictions’, advised Banmedica on the $2.7bn sale of its operations in Chile, Peru and Colombia to United Health Group. Jaime Herrera led the advice to IFM Investors in the €2.7bn global acquisition of 100% of OHL Concesiones. Gabriel Sánchez, who made partner in early 2017, and associates Vivianne Baptiste and Carolina Hernández are also noted. Other clients include Gas Natural Fenosa, Urbaser, The Abraaj Group, Grupo Orbis and AXA.

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Within: Insurance

Posse Herrera Ruiz has a niche practice in insurance matters related to major infrastructure projects and represents lenders and sponsors in the negotiations of complex policies to cover large EPC contracts. The team, led by recommended Oscar Tutasaura, also advises insurance companies on corporate and M&A matters. The practice advised Lazard Colombia on the sale of the assets of major Colombian health insurer, Cafesalud EPS, as well as of the shares of Estudios e Inversiones Médicas – Esimed, a health care provider that operates around 80 clinics nationwide. Other clients include Caixa Seguros, Liberty Mutual Insurance Company, AXA and Grupo Sura.

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