Our Team

​We are a highly specialized team of professionals which main goal is to help and support our clients towards the achievement of their objectives in a agil, practical and effective way.

We have the necessary tools to render a service of excellence.

We firmly believe in the permanent interaction between the clients and the Firm as a fundamental value.

Since the time of its creation, Lanfranco & Detry has experienced constant growth by incorporating new areas of practice enabling us to provide a complete legal service.

We have a network of correspondent firms that allows us to take care of our client's needs in the whole country.

The Firm.

In 1959 Héctor P. Lanfranco and Manuel J. Mariño formed Lanfranco & Mariño.

Amaro Detry was a partner of the Firm and the director of its debt recovery department for almost 30 years, specializing in collateral collections.

In 2000 part of Lanfranco & Mariño was absorbed by the law firm Marval, O'Farrell & Mairal. At that point in time Lanfranco & Detry was created.

The firm initially focused on debt recovery matters, both judicial and out of court.

In 2006 Martín J. Lanfranco joined the Firm broadening its areas of practice by incorporating general litigation, bankrupcty and reorganization and contracts.

In 2008 the expert in real estate matters Melitón González del Solar became a member of the Firm.

In 2013 Fermín O. Castro Madero joined the Firm. He is a specialist in banking and capital markets and mergers and acquisitions.

As a result of all of such joinings the Firm presently renders services concerning the most relevant legal areas.

Practice areas.

  • Litigation. Arbitration.
  • Banking and Finance.
  • International Trade.
  • Administrative Law.
  • Commercial Law and Antitrust Law.
  • Labour Law.
  • Bankruptcy and restructuring. ​
  • Capital Markets.
  • Agribusiness.
  • Real Estate.
  • Intellectual Property.
  • National Resources and Energy.
  • Insure.
  • Corporate, Foreign Investments, M&A.
  • Telecommunications and broadcasting.
  • Héctor Pedro Lanfranco

    Born in 1936. He graduated from the Universidad Nacional de Buenos Aires in 1959.

    After five years in the National Judiciary Power he joined his the firm of his father, Héctor Pedro Lanfranco, firm that had been created in 1921.

    In 1959 he was one of the founders of the firm Lanfranco & Mariño. In 2000 Amaro Detry and he founded Lanfranco & Detry.

    He has been very active in the business world as well as in social and community service institutions.

    Languages: Spanish and English.

    Martín Juan Lanfranco

    Born in 1966. He graduated from the Universidad Nacional de Buenos Aires in 1990.

    In 1991 he joined the firm Lanfranco & Mariño after having work at a civil court.

    He worked at the Secretary of Finance, Banking and Insurance of the Ministry of Economy and Public Works and Services (1994-1995). In 2000 he joined the firm Marval, O'Farrell & Mairal Studio as senior associate of the litigation department.

    In 2003-2004 he was an Advisor to the Chairman at the Central Bank of Argentina during the administration of Alfonso Prat-Gay. On behalf of the Central Bank he was a syndic at Seguros de Depósitos S.A. (SEDESA). He returned to Marval, O'Farrell & Mairal in 2005 and in 2006 he joined Lanfranco & Detry currently being its managing partner.

    He served as director at the Corporación Antiguo Puerto Madero S.A. between 2010 and 2011.

    He specializes in highly complex litigation matters, insolvency and bankruptcy, portfolio management and contracts.

    Languages: Spanish and English.

    Contact: mjl@lanfranco.com.ar

    Fermín O. Castro Madero

    Born in 1966. He graduated from the Universidad Nacional de Buenos Aires in 1987.

    Before joining Lanfranco & Detry he was a partner of the Banking and Capital Markets department at Marval, O'Farrell & Mairal from 2007 to 2013.

    He had previously worked at Vítolo Abogados (1995 a 1997), Llerena & Asociados (1993 a 1995), Tau Anzoátegui & Asociados (1989 a 1993), Linares Quintana, Badeni & Gagliardo (1988 a 1989) and at the National Judiciary Power (1987 a 1988).

    Financing (both local and international), restructurings, foreign investments, capital markets transactions (both national and international), mergers and acquisitions, foreign exchange matters, anti-money laundering matters, trusts, contracts and litigation can be mentioned within his expertise areas.

    The international publication The Legal 500 included him among the most remarkable lawyers in the banking and finance sector in Argentina, according to clients' opinion, in 2012 and 2013.

    He has been selected as one of Argentina’s best lawyers in 2004 and 2008 according to a survey prepared by the magazine Apertura.

    Languages: Spanish and English.

    Contact: fcm@lanfranco.com.ar

    Eduardo Bonis

    Graduated from the University of Buenos Aires, 2006; LL.M. from the University of Bologna, Italy 2009/2010.

    Before joining the firm, he was a partner at Navarro Castex Abogados firm between 2017/2021. He had previously worked as an associate at Marval, O`Farrell and Mairal; foreign associate at Pavia e Ansaldo of the city of Rome, Italy.

    He specializes in corporate and M&A, foreign investments and startups. He also has extensive experience in regulatory (banking and FX control) and compliance including fraud litigation and internal investigations.

    He is member of AIJA (Association Internationale des Jeunes Avocats), the Italian Chamber of Commerce in Argentina, and the Buenos Aires and San Isidro Bar associations.

    He participates as speaker at several national and international conferences regarding matters related to his areas of specialization and is actively involved in local and international specialized publications.

    Idiomas: Spanish, English, Italian and Portuguese.


    Mariano Gramajo

    Mariano Gramajo is a lawyer specialized in corporate law. Mr. Gramajo has focused his practice in advising companies in relation to contractual and corporate matters, mergers and acquisitions, capital markets, real estate transactions, agribusiness, financing transactions and general investment projects. He has been actively involved in advising investors in the start-up and growth of their companies and businesses, as well as on the structuring of transactions related to the areas of his expertise.

    He joined Lanfranco Law Firm in October 2018 and he also is a partner at the legal department of Auren’s office in Buenos Aires (Argentina). Previously he was partner of Gramajo, Mendez & Barredo between August 2010 and September 2018 and senior associate in the Banking sector of Marval, O´Farrell & Mairal (1997 - 2010), and he worked in Knight, Frank & Rutley in London (1996). Mr. Gramajo received his law degree from the Law School of the Argentine Catholic University (1996) and is currently doing a PhD. in Law at such university. He has also been assistant professor of “Civil and Commercial Contracts” at the University of Buenos Aires (1998 - 2004) and is currently professor of “Capital Markets” at the Master in Corporate Law of ESEADE University - Escuela Superior de Economía y Administración de Empresas (2003 - to date).

    In 2013 he was awarded the “Client Choice Award 2013” in the category "Corporate Law" in the Republic of Argentina by The International Law Office (ILO) and Lexology and in 2016 with the Global Law Experts (GLE) award “Lawyer in Corporate Law” for the Republic of Argentina.

    He is fluent in English and Spanish and is a member of the Buenos Aires Bar Association.




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