The Legal 500

Twitter Logo Youtube Circle Icon LinkedIn Icon
Work +54 11 4310 0100
Fax +54 11 4310 0200

Francisco A Macias

Work +5411 4310 0100
Marval, O'Farrell & Mairal

Work Department

Oil & Gas / Environment / Power.


Francisco A. Macías specializes in oil & gas, power, public services, infrastructure, natural resources, environmental law and protection of foreign investment. His practice is mainly focused on international and local oil & gas, infrastructure and power transactions. He also advises clients on gas and power regulatory matters and a wide range of oil & gas and power contracts.


Francisco has been a partner of Marval, O’Farrell & Marval since 2002. Before joining the firm he worked for the firm of Bazán, Cambré & Orts advising on oil & gas upstream and midstream transactions and environmental matters, from 1994 until 1997. He also worked for BBVA Banco Francés from 1993 until 1994.


English, French, Italian & Spanish.


He graduated from the Law School of the Argentine Catholic University in 1991 and obtained a Post Graduate Degree in International and EC Law from the School of Law of the University of Siena, Italy, in 1993. In 1992 he obtained a postgraduate degree in International Operations from the National Foreign Office Institute of Argentina -ISEN-.



Within: Environment

Marval, O'Farrell & Mairal excels across the full spread of transactional support matters, regulatory issues and environmental litigation. Oil and gas expert Francisco Macías heads the group and continues to represent Compañía General de Combustibles in three environmental class actions filed by ASSUPA against several oil and gas companies, which seek remediation for the alleged damage caused by exploration and production activities. On the transactional front, the team advised GE on the environmental aspects of its acquisition of a stake in YPF Energía Eléctrica. Senior associate Gabriel Fortuna is also a key contact.

[back to top]

Argentina: Energy and natural resources


Within: Electricity

Under the leadership of energy and natural resources head Francisco MacĂ­as, the team at Marval, O'Farrell & Mairal is particularly active in transactional matters. Macias recently led advice to Senvion on the construction and operation of the $150m Vientos Los HĂ©rcules wind farm, which is co-owned by Eren and Total, and he is also advising Chinese nuclear energy companies on the construction of a nuclear power plant in Buenos Aires. Additionally, the department possesses significant regulatory expertise, with public and administrative law associate Gonzalo Santamaria particularly recommended for work in this sector.

[back to top]

Oil and gas

Within: Leading lawyers

Francisco MacĂ­as - Marval, O'Farrell & Mairal

Within: Oil and gas

The oil and gas practice at Marval, O'Farrell & Mairal strikes an enviable balance between corporate and contentious matters, with a strong recent showing in major energy arbitrations. As a case in point, transactional specialist Ricardo Beller acted hand-in-hand with the firm’s litigation department to successfully represent Total Austral in a high-profile arbitration brought by Metrogas stemming from the alleged breach of an international natural gas supply agreement. In another example of the firm’s ability to leverage its extensive resources to provide multidisciplinary advice, department head Francisco Macías teamed up with the corporate and tax groups to advise BP on a joint venture with Bridas and CNOOC to form Pan American Energy Group. Macías also led the oil and gas aspects of the firm’s advice to Total on the Argentine leg of its €237.5m multi-jurisdictional acquisition of a minority stake in Eren. Other recommended names include experienced counsel Arturo Pera and Pedro Serrano Espelta.

[back to top]

Back to index

Legal Developments worldwide

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to