Mr Oscar Tutasaura > Posse Herrera Ruiz > Bogota, Colombia > Lawyer Profile

Posse Herrera Ruiz
CRA 7 NO 71-52

Work Department

Corporate / M&A


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 lawyer from Universidad del Rosario, with a specialization in commercial law from Universidad de los Andes and a master’s degree in international legal studies from Georgetown University. He is admitted to Colombia and the State of New York. He is a member of the New York State Bar and the New York City Bar.


He speaks Spanish and 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

Lawyer Rankings

Colombia > Compliance and white-collar crime

Posse Herrera Ruiz‘s compliance team stands out for its ‘client service, knowledge and professionalism‘. The group draws on the wider firm’s full-service offering to handle a wide range of compliance and white-collar defence cases, with a strong focus on anti-corruption, AML and due diligence matters. The practice is led jointly by corporate partner Oscar Tutasaura, who advised on a string of compliance programmes over the past year, and infrastructure and public law head José Alejandro Torres. The group also includes ‘outstanding lawyerLuis Miguel Russi, who is an increasingly prominent associate with an emphasis on criminal litigation.

Colombia > Insurance

Lawyers at Posse Herrera Ruiz possess ‘great knowledge of insurance‘. The multidisciplinary group draws upon partners in corporate, financial law and litigation to provide broad coverage of the sector. Corporate specialist Oscar Tutasaura is noted for his non-contentious expertise and recently handled various regulatory, commercial and transactional matters. On the contentious front, high-profile litigator Carolina Posada is a key contact; she co-heads the practice together with Tutasaura. Financial law and capital markets partner Natalia Escobar is also equipped to advise on insurance law matters. Support is provided by director Diana Salazar, who specialises in energy and insurance and demonstrates ‘mastery of the insurance area‘.

Colombia > Corporate and M&A

Posse Herrera Ruiz houses a full-service corporate and M&A practice, which routinely advises on a wide range of transactional, commercial and compliance matters. Widely recognised as a market leader in energy-related deals, where it frequently links up with its top-tier energy and natural resources department, it also has a particularly strong presence in the technology, infrastructure and real estate fields. Managing partner Jaime Herrera spearheads the M&A group and is sought after by both domestic and multinational clients; he recently paired up with Oscar Tutasaura to advise the Financiera de Desarrollo Nacional and the Colombian Ministry of Finance on the local aspects of the $3.6bn sale of its 51.4% stake in Interconexión Eléctrica to Ecopetrol. On the technology side, Jaime Cubillos advised Webhelp on the Colombian corporate aspects of its acquisition of Onelink Holdings. On the infrastructure front, talented M&A specialist Gabriel Sánchez teamed up with infrastructure and public law head José Alejandro Torres, as well as the finance and tax teams, to advise Odinsa on the creation of an investment platform for toll road assets in Colombia and the region. Among the group’s key associates, Catalina Noreña, Susana Gómez Ramírez, Christian Diaz Ordoñez and Camilo Loveras provide ongoing support in corporate and M&A transactions. Since publication, Gómez Ramírez has been raised to the partnership – effective as of January 2023.