Mr Alan Arntsen > Pérez Alati, Grondona, Benites & Arntsen > Buenos Aires, Argentina > Lawyer Profile

Pérez Alati, Grondona, Benites & Arntsen
Alan Arntsen photo

Work Department

Aviation and Maritime Law
Banking & Financial Institutions
Corporate Finance
Debt Restructuring
Mergers & Acquisitions
Project Finance & Infrastructure


Mr. Arntsen is one of the founding partners of PAGBAM.


Corporate and cross border transactions (covering corporate finance, M&A´s, banking, energy and agribusiness).

In and out of court restructurings and workouts.

Sovereign debt restructuring (including The Republic of Argentina – in its various stages during the last 15 years).

Major infrastructure cross border transactions.


Major foreign investors with assets in Argentina including board membership.

E&P foreign investors owning assets in Argentina.

Agribusiness multinationals (crop protection and seed technology) owning assets in Argentina.

Multilateral organizations, international banks and lenders

International depositaries.

Bondholders, trustees and steering committees.


Foreign associate. Sullivan & Cromwell LLP, New York, United States of America (1983-1984). 

Lecturer at: Escuela de Abogacía de la Ciudad de Buenos Aires, the “Second Annual Meeting on Banking and Finance in Latin America”, American Conference Institute, the “International Law Association” and the Pontificia Universidad Católica Argentina Santa Maria de los Buenos Aires.

Professor at ESEADE University (Master of Finance degree).

Contributions: Assistant Dean Frederic Snyder at Harvard Law School and Eli Lauterpacht, Q.C., for the “International Law Review”.


 Spanish and English  


Member of Bar Association of the City of Buenos Aires. 

Other: Harvard Club of Argentina, The British Institute of International and Comparative Law, The American Society of International Law, The Harvard Club of New York City and Harvard Law School Association. The Annual Oxford & Cambridge Annual dinner group.


Bachelor of Laws. Pontificia Universidad Católica Argentina Santa María de los Buenos Aires. Buenos Aires, Argentina.

Bachelor of Laws, LL.B. (Hons.). Faculty of Law, Cambridge University. Cambridge, England, United Kingdom of Great Britain. College: Christ´s.

Master of Laws, LL.M. Harvard Law School, Harvard University. Cambridge, Massachussetts, United States of America.Foreign associate. Sullivan & Cromwell LLP, New York, United States of America (1983-1984). 

Lawyer Rankings

Argentina > Energy and natural resources > Oil and gas

Pérez Alati, Grondona, Benites & Arntsen’s 16-strong oil-and-gas group attracts praise for its ‘technical capacity and flexibility’. The team has a broad multidisciplinary focus, with experience in transactions, regulatory matters, dispute resolution, tax and environmental law. Petrolera El Trébol is a key client and the firm routinely advises the Phoenix Global Resources subsidiary on its E&P activities in Argentina. Francisco Javier Romano heads the team and brings to bear significant hands-on experience following in-house roles at Chevron, Pan American Energy and Bridas Corporation. Senior patners Mariano Grondona, Alan Arntsen and Diego Serrano Redonnet all participate in the sector, as does transactional partner Tomás Pérez Alati. Key associate support comes from Ignacio Payarola, who focuses on energy, renewables, oil and gas and administrative law and litigation.

Argentina > Banking and finance

Comparable to the best teams in Argentina’, Pérez Alati, Grondona, Benites & Arntsen attracts strong praise for its ‘experience and personal dedication’ and its ‘skill to handle complex matters’. The group handles a varied mix of banking, capital markets, structured finance and restructuring work, with extensive expertise in the energy, agribusiness and real estate sectors. It is also equally adept at both lender and borrower-side mandates, with local and multinational financial institutions, funds and corporations among its key clients. Diego Serrano Redonnet is widely recognised as a leader in the area and combines strong skill sets in banking, corporate and private equity. The group also includes ‘excellent professionalMaría Gabriela Grigioni, as well as founding partners Alan Arntsen and Mariano Grondona. Impressive younger lawyer Danilo Parodi Logioco was recently promoted to counsel.