Firm Profile > Marval O’Farrell Mairal > Buenos Aires, Argentina

Marval O’Farrell Mairal

Banking and finance Tier 1

The broad finance practice at Marval O’Farrell Mairal is commended for its ‘significant exposure to different types of transactions’ and its ability to ‘understand transactions from a commercial and legal point of view’. Well weighted between transactional and regulatory matters, the group draws on its full-service offering to advise on all stages of banking and finance mandates. A popular choice for capital markets, the firm also consistently advises on corporate lending, structured finance, project finance, banking M&A and Central Bank-related litigation. Clients include domestic and multinational financial institutions, trust companies, alternative lenders and corporates, with the firm's New York office standing as a significant asset in cross-border work. Firm chairman Santiago Carregal oversees the group and is noted for his extensive market experience. Gabriel Matarasso coordinates the department and has a strong record in debt reorganisations, among other issues. The experienced Roberto Silva Jr is highly regarded for his specialist expertise in securitisations and trusts — he is also strong in capital markets. In addition, the team benefits from the regulatory prowess of Cecilia Mairal and the transactional capability of Juan Diehl Moreno, who led on several of the firm’s headline deals over the past year. Senior associate Francisco Abeal is also recommended.


It makes a difference that partners are personally involved in all transactions, regardless of the size of the transaction.’

The factors that distinguish this firm are its ability to stay up-to-date on relevant topics, its professional lawyers, and the potential to work across departments to provide full advice on all of the client’s business needs.’

They have experience and significant exposure to different types of transactions.’

The team has the ability to understand transactions from a commercial and legal point of view and provides strategic analysis.’

The availability and speed of response sets them apart from the rest, particularly Roberto Silva Jr.’


Key clients

Credit Suisse

BNP Paribas

JPMorgan Chase Bank

Morgan Stanley


Goldman Sachs

Banco do Brasil

Bank of New York


Deutsche Bank

TMF Trust

Banco de Servicios y Transacciones

ICBC Argentina

Banco Galicia

Santander Rio

Banco Supervielle

Banco Itau

Banco Comafi

Banco Industrial


Bankruptcy and restructuring Tier 1

Already a top-tier firm for restructuring, Marval O’Farrell Mairal further strengthened its practice with the absorption of contentious bankruptcy specialist Rivera & Asociados, which saw its team swell by two partners and four associates. The combined group, which is equally adept at judicial and out-of-court restructurings, routinely advises creditors, shareholders, debtors and trustees in a wide range of bankruptcy and restructuring cases, across all industry sectors. Experienced of counsel Martín Campbell possesses an impressive record in headline restructuring cases. Department head Fernando Hernández has a focus on cross-border restructurings. Julio César Rivera (h) and Gonzalo Fontana are recommended for contentious cases.

Practice head(s):


Marval’s expertise in restructurings is excellent. I would say that it is difficult to match, since Argentina as a country, and its businesses in particular, have time and again needed to negotiate their obligations.’

Fernando Hernández is an excellent professional.

Key clients

Credit Suisse

TWM Capital

Capital Markets Argentina

InterContinental Hotels Group


RR Donnelly de Argentina

Credit Suisse

Kawasaki Motors Corp.

Banco de Galicia y Buenos Aires

Banco Santader Río

BBVA Argentina

Banco de la Provincia de Buenos Aires

Banco de la Nación Argentina

HSBC Bank Argentina

Novozymes BIOAG

Avions de Transport Regional

Peugeot Citröen Argentina


Competition and antitrust Tier 1

Marval O’Farrell Mairal’s first-class team stands out for the ‘speed with which it provides answers’ and for its ability to provide ‘clear and concise advice on the possible risks’. On the merger-review side, the firm’s heavyweight corporate practice translates into a steady flow of cases — the firm notably secures the highest volume of merger reviews in the market — and few high-stakes mergers are cleared in Argentina without this team’s involvement. Its close links with major global law firms mark it as a particularly strong performer in cross-border matters, including recent work for household-name multinationals such as Disney, Warner Media and Pfizer. On the investigations front, the group is routinely involved in many of the most sensitive and complex cases conducted by the Antitrust Commission. The third pillar of the practice is compliance, where the team assists with in-house compliance audits and training programmes. High-profile expert Miguel del Pino heads the department and is widely recognised as a market leader. Santiago del Rio is an impressive up-and-coming competition specialist. The team also includes the experienced Gabriela Ariel Irizar and rising star Ignacio Mora — both are associates.

Practice head(s):


The team offers comprehensive advice and is always available to resolve problems and projects.’

It stands out for its availability and the speed with which it provide answers, and any other type of assistance, at a moment’s notice.’

The team offers clear and concise advice on the possible risks.’

The partners are directly involved in the case. It is a very good team of lawyers with knowledge in the subject.’

Key clients

American Airlines




Warner Media



General Motors

Microsoft Corporation


Compliance Tier 1

The sizeable team at Marval O’Farrell Mairal attracts rave reviews for its ‘talented lawyers’, ‘deep subject matter expertise’ and ‘deep knowledge of global best practices’. The broad group covers all the bases, with strong offerings in compliance, anti-corruption and investigations. The firm is a popular choice for both local and cross-border issues, with sources commending the team as ‘great at advising foreign clients doing business in Argentina’ — it also advises local companies on international compliance regulations. Department head Pedro Serrano Espelta focuses exclusively on compliance and is a ‘pioneer in his field’. Gustavo Morales Oliver, who is ‘extremely analytical and articulate’, is also fully dedicated to the area.

Practice head(s):


Leading lawyers with extensive experience in Argentina and deep knowledge of global best practices.’

Great at advising foreign clients doing business in Argentina.

Marval has a market-leading practice with talented lawyers and deep subject matter expertise.’

In addition to working together on important client engagements, I’m very impressed by the firm’s annual anti-corruption forum each September. It’s a great example of prominence and market leadership.

The compliance team which advises us is splendid. Their knowledge is comprehensive and their response times are ideal for a business like ours. They are far better than the teams at other firms.

The advantage of the team is its thoroughness. Their documents and opinions are the most thorough and are provided the quickest.

A good team with a very broad experience. Pleasant to work with.’

Pedro Serrano Espelta and Gustavo Morales Oliver are both truly impressive lawyers and unquestionably leaders in the marketplace. Pedro leverages deep experience to think strategically and offer constructive advice. Gustavo is extremely analytical and articulate, and I appreciate his thoughtfulness. Both are excellent lawyers and colleagues.

Pedro Serrano Espelta is a pioneer in this field, particularly in M&A transactions and regulated industries. Gustavo Morales Oliver is a young and very promising partner, with flawless technical knowledge.’

Pedro Serrano Espelta has wide experience of corporate matters and international transactions, which is very useful in white-collar matters involving non-Argentine clients. He is probably quite rare in Buenos Aires to be able to provide this.’

Key clients




American Tower Corporation






Loma Negra

Consumer law Tier 1

Marval O’Farrell Mairal’s consumer protection practice has a ‘great international outlook’, according to sources. Certainly, the firm represents a impressive roster of major global companies — across a wide range of market segments — on product liability defence cases. Areas of expertise include labelling, advertising campaigns, product recall and insurance coverage, and the team routinely advises on complex and sensitive litigation and class actions. Among the names to note, the ‘highly experiencedLeandro Castelli is highly sought after for product liability claims. Facundo Viel Temperley has ‘great litigation skills’ and is recommended for class actions. Alejo Gascón is a talented senior associate.


The best firm I have ever worked with in Argentina.

They represent the biggest corporations doing business in the country, have a great international outlook and are easy to work with.’

Leandro Castelli is highly experienced in consumer law issues, with additional expertise in public policy.

Facundo Viel Temperley has great litigation skills and international experience.

Key clients

Massalin Particulares

Bristol Myers Squibb

Peugeot – Citroën

INC (Carrefour)

Philip Morris International


General Motors


Columbia Sportswear Company

Hermès Argentina

Magneti Marelli Cofap

Apple Argentina

BNP Paribas

Lojas Renner

Banco Itaú

Corporate and M&A Tier 1

According to some, Marval O’Farrell Mairal is the ‘gold standard for M&A in Argentina’. The sizeable group ranks among the region’s largest dedicated corporate departments and stands out for its ‘broad knowledge in the majority of subjects’ and its ability to ‘lead on any local or international M&A transaction’. Certainly, the firm can turn its hand to deals in any industry and possesses first-class experience in the full range of transactions, from company incorporations and joint ventures, through to major M&As and restructurings. A key contender for regional and multi-jurisdictional matters, the team’s cross-border prowess was recently demonstrated by its advice to Japan-based SoftBank on its $1bn investment in food start-up Rappi, which represented the largest ever investment in a Latin American tech start-up. Other strings to its bow include its ability to lean on top-tier tax, competition and finance practices for support on high-end transactions. Among the names to note, corporate head Pablo Artagaveytia is a powerhouse on the M&A front and has a strong record in coordinating regional deals. Pablo Viñals Blake is another heavy hitter and spearheads the private equity, venture capital and agribusiness groups. Banking and finance head Santiago Carregal is also a leader on the corporate side and has ‘exceptional commercial sense’. Other experienced names included seasoned senior partner Héctor Mairal, real estate-focused partner Hernán Slemenson, M&A specialist Pablo Garcia Morillo and Diego Krischcautzky, who combines strength in M&A and private equity and led on the SoftBank deal. Diego Chighizola is a talented up-and-coming partner, with an emphasis on the agribusiness, energy and real estate areas, while María Laura Bolatti Cristofaro is a capable associate and supported on the SoftBank deal.


The gold standard for M&A in Argentina; few firms have their expertise or resources.’

Their strengths are their experience and expertise. They differentiate themselves from their competitors through the quality and speed of their responses; the detail in their work; and their availability to respond to the client’s requests.’

The group stands out for its knowledge of corporate matters. It is an excellent team which can lead on any local or international M&A transaction.’

They have broad knowledge in the majority of subjects.’

Santiago Carregal stands out as one of the most knowledgeable lawyers in the market, with exceptional commercial sense.’

Diego Krischcautzky and Macarena García Mirri are outstanding partners.’

An excellent team led by Diego Krischcautzky.

Key clients






Turner – Time Warner





EMS Capital (Edmond Safra)

Banco do Brasil


Diagnósticos da América (DASA)

Loma Negra


Lamb Weston

Dispute resolution Tier 1

Marval O’Farrell Mairal’s comprehensive dispute resolution department overshadows its competitors both in size and experience. The 11-partner group handles the full range of contentious matters, from local and cross-border litigation, through to class actions and highly sensitive international arbitrations. The firm represents an enviably diverse portfolio of clients, remaining a first port of call for a string of multinationals such as Assurant, Credit Suisse and Repsol. Ricardo Ostrower heads the department and brings to bear an impressive record in complex, politically charged litigation. Santiago Soria is highly regarded for his expertise in energy and natural resources-related disputes; he is representing Roch in a complex arbitration against Apco Austral and Pluspetrol. Senior of counsel Martín Campbell is also noted for his top-level experience. The recent arrivals of Julio César Rivera (h) and honorary partner Julio César Rivera (who is also a "supplementary judge" or “conjuez" of the National Supreme Court) from Rivera & Asociados further boosts the firm's contentious capability, particularly in the insolvency, arbitration and constitutional law areas. Other recommended names include banking litigation specialist Facundo Viel Temperley, Rodrigo García and Elías Bestani, who has an emphasis on insurance disputes.

Practice head(s):


At Marval O’Farrell Mairal, Julio César Rivera — both father and son — are exceptional for disputes in Argentina.’

Key clients



Barclays Bank

BNP Paribas


Credit Suisse


General Motors

Peugeot Citröen


Total Austral


Pan American Energy

Transportadora de Gas del Sur

Environment Tier 1

Marval O’Farrell Mairal’s team impresses with its ‘professionalism’, ‘immediate response’ and ability to remain ‘informed on all topics’. A popular choice to represent major global energy and infrastructure companies on high-stakes and highly sensitive environmental litigation, the group also advises on regulatory issues and M&A related matters. Francisco Macías, who brings to bear strong experience in energy and infrastructure-related work, heads the department. Senior associate Gabriel Fortuna and semi-senior associate Jimena Montoya are also noted for their increasing prominence in the environmental law area.

Practice head(s):


The team is highly trained to respond to concerns and respond to requests.’

The differential is the high professionalism, the immediate response and the constant training that makes them informed on all topics.’

The fact that they are a full-service firm, gives the client security in their advice. We highlight Gabriel Fortuna and Jimena Montoya.’

Key clients

Volkswagen Argentina




Danone Argentina



Compañía General de Combustibles

Compañía Mega


Pachon (Xstrata)

Copetro (Oxbow)



Insurance Tier 1

Marval O’Farrell Mairal’s ‘very professional team’ finds favour for its lawyers’ focus on ‘resolving conflicts in the most efficient, economical and practical way possible’. The enviably well-rounded group touches on all key pillars of insurance law, with strong skill sets across a broad range of insurance classes, including niche areas such as aviation and marine. Litigation is a sweet spot and the team handles insurance and reinsurance claims, product liability cases and collective actions against insurance companies. On the regulatory front, it routinely advises on general compliance matters, the marketing of insurance products and administrative proceedings. The firm’s market-leading corporate department also marks it as a popular choice to assist with M&A and general corporate matters. Department head Pablo Cereijido handles a mix of regulatory, contentious and transactional work and is singled out by sources as ‘the best insurance and reinsurance lawyer in the country’. Elías Bestani, who has an emphasis on contentious work, is also highly regarded for his ‘experience and analytical capacity’. María Victoria Rodríguez Mamberti is a talented semi-senior associate.

Practice head(s):


Marval’s insurance, reinsurance, maritime and aviation team stands out for its commitment and seriousness in handling the cases that are entrusted to it. Lawyers are always focused on resolving conflicts in the most efficient, economical and practical way possible for the interests of their clients.’

The practice covers all areas; it is the only Argentine firm with this multidisciplinary approach.’

They are a very professional team with excellent customer service.’

It compares very favourably to other firms due to its excellent professionals, who demonstrate strong analytical and decisive capacity.’

Pablo Cereijido is the best insurance and reinsurance lawyer in the country.’

We usually work with Elías Bestani and associate María Victoria Rodríguez Mamberti. In addition to their professional credentials, an outstanding feature of their way of working is that they interact with the client on a permanent basis. Occasionally we also work with Pablo Cereijido, who is another excellent professional.’

Elías Bestani is a real professional, who you can work with in a team very easily. We highlight his experience and analytical capacity.’

Key clients



Marsh – Guy Carpenter & Company


Assurant Argentina Compañía de Seguros

Liberty Mutual Surety

Cardif Seguros


Hanseatica Compañía de Seguros

Mitsui Sumitomo Insurance

Intellectual property Tier 1

According to many, Marval O’Farrell Mairal stands out as ‘the leading IP firm in the market’, due to its ‘peerless strength and depth’ and ability to provide ‘clear advice, which is to the point and very concise’. The sizeable nine-partner department excels in all key areas of practice, fielding premier teams in trade marks, patents, copyright and IP litigation. The firm also covers the full spectrum of matters, from registration and protection strategies, through to litigation, with complementary skill sets in data protection, unfair competition, and advertising and entertainment. Among its sweet spots, its patents offering is particularly impressive and the group handles approximately 60% of the country’s patent litigation cases and 25% of patent applications. Among the names to note on the trade mark front, Iris Quadrio provides clients with a ‘true collaborative partnership’, Gustavo Giay is highly regarded for trade mark litigation, while Sergio Ellmann is one of Argentina’s most prolific trade mark filers. On the patent side, Martín Bensadon is a leading figure for complex litigation, while Ignacio Sánchez Echagüe and Martín Chajchir are up-and-coming patent litigation specialists.


The team’s main quality is to provide advice with high technical knowledge and, at the same time, with a wide availability to answer queries in the short term.

The leading IP firm in the market; it has peerless strength and depth.

Marval provides clear advice, which is to the point and very concise. As a non-Spanish speaker, I appreciate their excellent language skills.’

A very efficient and friendly team, whose speed of working stands out.’

We work mainly with Iris Quadrio. She is friendly and good fun to work with. She has no ego and is happy to accept suggestions from us on how we run our cases, leading to a true collaborative partnership.’

Ignacio Sánchez Echagüe stands out for his great knowledge in IP matters, his excellent predisposition and his availability to offer quick advice.’

Key clients

Glaxo SmithKline

Ford Motor Company

The Procter & Gamble Company

F. Hoffmann-La Roche


The Coca-Cola Company (in Argentina and the Caribbean)


Virgin Enterprises (in Argentina and Latin America)


Bristol-Myers Squibb

McDonald’s Corporation


Microsoft Corporation

Honda Motor

Johnson & Johnson


Merck, Sharp & Dohme


New Balance

Entertainment One

International trade and customs Tier 1

Marval O’Farrell Mairal’s group finds favour for its ‘excellent professionals’, who ‘deeply understand antidumping rules in Argentina’. Indeed, the practice is widely recognised as a dominant force in trade remedies, where it is a leader in terms of market share. However, the deep and broad department also packs a punch in customs law, tariff code interpretation, quantitative restrictions and WTO dispute-resolution proceedings. The team’s ability to draw on its financial services and administrative law departments is also a valuable asset for clients looking for advice on foreign exchange controls. Department head Pablo Gayol ‘always anticipates the actions taken by the authorities’ and has an impressive track record in antidumping investigations. Experienced counsel Patricia López Aufranc also concentrates on antidumping matters, with supplementary expertise in import restrictions. The team also includes ‘hard-working’ associate Jazmine Daruich and customs specialists Horacio García Prieto and Juan Pablo Rothschild.

Practice head(s):


They have excellent professionals, who deeply understand antidumping rules in Argentina.’

Pablo Gayol is very clever and has a solid background in antidumping rules. He always anticipates the actions taken by the authorities. Associate Jazmine Daruich is a very hard-working professional. Drafts and letters prepared by them both are perfect.’

Key clients

Ariston Thermo / Ariston Thermo Argentina

O Tek Argentina

ABIT Associação Brasileira da Indústria Têxtil e de Confecção

Roca Brasil / Roca Argentina

adidas Argentina

Itagres Revestimentos Cerâmicos

Incepa Revestimientos Ceramicos

Capricornio Textil

Covolan Indústria Textil

Textil Canatiba

Companhia De Fiacao e Tecidos Cedro e Cachoeira

Companhia De Fiação E Tecidos Santo Antônio

LG Electronics Argentina

Steptoe & Johnson

Clorox Argentina

Seaboard Energías Renovables y Alimentos

Aguas Danone de Argentina

Labour and employment Tier 1

Strategic and business-oriented’, Marval O’Farrell Mairal’s labour and employment group scores highly for its ability to ‘solve the client’s problems as efficiently and effectively as possible’. The practice fields a deep bench, which includes six dedicated labour law partners, ensuring that it is a top choice for complex litigation and large-scale corporate support work. It also advises on collective bargaining, restructuring and compliance issues. The firm’s strength in both local and cross-border matters is a recurring theme among sources and its client list includes multinational employers such as Amazon, Globant and Nike. Managing partner Javier Patrón is widely recognised as one of the market’s foremost labour litigators. Enrique Stile is noted for his ‘practical sense of the business problems at hand’ and has strong experience in advising international employers. Other recommended names include José María Llano, who focuses on complex litigation, up-and-coming partner Diego Kelly, who specialises in non-contentious matters, and litigator Guillermo Osorio, who was recently promoted to partner.

Practice head(s):


The Marval labour team is particularly impressive. The attorneys are first rate and solve the client’s problems as efficiently and effectively as possible. It is a great experience working with them.’

Throughout the years, Marval’s labour and employment team has been recognised in Latin America for the excellence and high quality of its legal services. The reason is that, in addition to constantly developing its professionals, Marval provides its services from strategic and business-oriented mindsets, handling labour issues with excellent results.

There are other Argentine law firms following Marval’s path, but the fact that Marval is a full-service firm makes it unique. Currently, labour and employment matters, depending on the situation, require a multidisciplinary approach including advice on tax, corporate, contractual (etc.) matters related to labour, and Marval has the capacity provide all of this in a very client-oriented and cost-effective way.’

Enrique Stile in particular stands out. He has a very practical sense of the business problems at hand and knows exactly what to do to solve it as quickly and efficiently as possible. He is very easy to work with and remains calm and good-natured throughout the representation.’

Enrique Stile led the team in both the domestic and international market with an outstanding performance. He worked in an inspiring, collaborative spirit with all his peers, international laws firms and several institutions.’

Diego Kelly and Rodrigo Solá Torino are up-and-coming individuals who provide great work for domestic and international clients.’

Key clients

Alexion Pharma



Morgan Stanley

Sensient Technologies

Brother International Corporation

Moët Hennessy • Louis Vuitton


US Department of Justice


Brembo Group


Mining Tier 1

The ‘second-to-none’ mining practice at Marval O’Farrell Mairal impresses with its ‘vast resources coupled with peerless experience and commitment’. The team excels across the full range of mining issues, including planning and mining rights, environmental matters, project construction, joint ventures and finance deals. The group also benefits from its ability to lean on the firm’s market-leading corporate practice to advise on complex, multi-jurisdictional mining transactions, such as its advice to South Korea-based POSCO on its $280m acquisition of lithium brines-related mining rights from Galaxy Resources. Additionally, it packs a punch in contentious work, with strong expertise in commercial and regulatory litigation. Widely lauded as a market leader, department head Luis Lucero ‘simply towers above the competition’ on the back of his involvement in many of Argentina’s largest mining projects — he led the POSCO deal. Dedicated mining partner Leonardo Rodríguez is also highlighted as an ‘exceptional lawyer’ and specialises in commercial law and litigation. Associate María Mercedes Rudolph, who ‘excels in company and corporate law’, and senior associate Andrés Villarreal are also recommended.

Practice head(s):


Marval’s mining team is second-to-none. Vast resources coupled with peerless experience and commitment make this the outstanding mining practice in Argentina.’

They have excellent delivery: quick, precise and without any errors. It is a multidisciplinary team, which reassures us that we can trust them to advise on any kind of matter.’

The client service of the whole team is very friendly. I think they are superior to other teams in other firms.

The team is excellent, both in terms of its technical knowledge and its experience and network of contacts.’

The head of the practice is Luis Lucero. He is the go-to person for all matters, especially those that, in light of their complexity, require an innovative approach. Having worked with most of his peers, I would not hesitate to reach out to Luis and his team in future. He simply towers above the competition.

In spite of clearly being the leading practitioner in the field,  Luis Lucero is happy to make himself available whenever his sound advice, clear judgement and legal and industry knowledge are required. No matter is too trivial, or too complex for him. He also makes sure the issue gets resolved, taking a personal interest in the outcome and deliverable required.’

Leonardo Rodriguez is an exceptional lawyer with experience in many practices but a particular focus and specialisation in the mining industry, which gives him an advantage.’

Leonardo Rodriguez demonstrates excellent knowledge and skill sets in his realm of expertise.’

Key clients


AngloGold Ashanti

Newmont Goldcorp

Pan American Silver

Hochschild Mining


Anglo American


Cámara Argentina de Empresarios Mineros

Coeur Mining

Public law Tier 1

Marval O’Farrell Mairal’s ‘outstanding’ public law department is distinguished by its ‘dedicated professionals’ and its ‘scope and sophistication’. The first-class group specialises in all areas of public law, from the design of regulatory frameworks, through to procurement proceedings and complex public law disputes. The team also works closely with the firm’s compliance department to advise on regulatory and anti-corruption matters. Héctor Mairal is a senior expert, with strong experience in M&A transactions and sensitive disputes. Other key contacts include María Lorena Schiariti, who stands out for her ‘unparalleled’ knowledge and experience, and Enrique Veramendi, who specialises in complex public law issues. Associate Gonzalo Santamaria is also recommended for his focus on public law.


‘Public law in Argentina is a very specific area of law which requires agility and experience. As an in-house lawyer, I need to know that the whole external team will be available to handle any urgent matters that arise. The lawyers in Marval, O’Farrell Mairal’s public law team are dedicated professionals, with great experience in the area.

The team is detail-oriented and available to assist their clients at any time. The firm’s lawyers have a broad knowledge of public law and advise us accurately on public procurement issues.

The work of the public and administrative law department has been outstanding; we cannot compare them to other firms in the market because of the scope and sophistication of the service they provide.

What especially stands out is that the solutions they offer, and the responses they provide to our queries, are always creative and show strong conceptual skills, which enables us to make safe commercial decisions.’

We work with María Lorena Schiariti and her team, including Juan Manuel Naveira and Gonzalo Santamaría. They specialise in public and administrative law, as well as compliance and anti-corruption.

We have chosen to work exclusively with Ms Schiariti for many years and there are very clear reasons for this: her knowledge and experience in regulatory matters is unparalleled by other lawyers in the market. Her broad experience allows her to respond to our queries precisely and in detail, providing advice that has a perfect balance of value and efficiency.

María Lorena Schiariti is one who stands out for her high level of professional capability and client care.

Key clients


Dow Chemical


Autopistas del Sol




Salini Impregilo


Grupo Concesionario del Oeste

Tax Tier 1

The ‘exceptional’ tax team at Marval O’Farrell Mairal finds favour for its ‘multidisciplinary knowledge’, ‘good business sense’ and ‘great technical understanding’. The deep and broad practice provides comprehensive coverage of tax law, with its first-class corporate offering a key driver of its work on the transactional side — it also has specialist experience in financial services and energy-related deals. On the contentious front, the firm is routinely engaged to advise on complex litigation, including representing companies before the National Tax Authority. Additionally, the group’s multinational client list stands as testament to its strength in cross-border tax matters, with Phillip Morris, General Motors and Trafigura all on the department’s books. María Inés Brandt is commended by many as ‘the best tax lawyer in the country’ and handles a mix of high-level transactional and contentious work. Tax and customs specialist Horacio García Prieto is highlighted as a ‘leading lawyer for constitutional and customs matters’. Other senior names include Gabriel Gotlib, who is recognised for his record in international tax, Walter Keiniger, who focuses on corporate transactions and wealth planning, and Fernando Vaquero.


The tax team is exceptional. Their responses to our queries are rapid and thorough.’

They have a great technical understanding of tax matters in Argentina and provide us with constant support.

They are practical and flexible, with a strong understanding of the current and historical tax situations that will influence decision making.’

The firm has lawyers who are highly specialised in different areas of law. There are various law firms with teams that provide a high-quality service, but Marval is a market leader in many areas.’

The team is very good at putting together and structuring deals and is very creative. An innovative team with multidisciplinary knowledge and lawyers with good business sense.

María Inés Brandt is my go-to tax lawyer. She is a leader in the market and heads a very well-rounded and professional team that always takes care to respond to clients on time and in full.

María Inés Brandt is a creative lawyer, which is essential in a tax adviser, but her advice is always substantial and reliable, with an accurate assessment of the risks and benefits. In my opinion, she is without a doubt the best tax lawyer in the country.

For constitutional and customs matters, partner Horacio García Prieto is, without a doubt, a leading lawyer. His experience, solid knowledge, and very clear and precise explanations are evident in his work.’

Gabriel Gotlib and associate Constanza Eva Ferreyra Fernandez show excellent availability and responsiveness. They have an in-depth knowledge of the tax code and a good understanding of the commercial side of our business.’

Walter Keiniger is always extremely available and agreeable, and always seeks out solutions to our legal issues.’

Fernando Vaquero is an extraordinary lawyer and person. He is always available, attentive and well informed.

Key clients



Banco Itau





General Motors

Julius Baer

Norwegian Air Shuttle

Phillip Morris

Tata Consultancy Services

Faena Group

TMT Tier 1

According to some, Marval O’Farrell Mairal is ‘the best in Argentina’ for TMT matters, on the back of its ‘business-savvy’ and ‘very smart lawyers’. The group stands out for its impressive combination of regulatory and transactional expertise, and it also benefits from its ability to lean on the firm’s specialist offering in technology-related white-collar crime. The department’s client roster is well balanced across all key pillars of TMT, including major local and global names such as Claro Argentina, Intelsat, Grupo Vila-Manzano and Google. Daniel Di Paola advises on transactional and regulatory matters related to the telecoms, broadcasting and entertainment sectors. Di Paola jointly heads the team together with transactional specialist Javier Etcheverry Boneo and Gustavo Giay, who specialises in IT and privacy law. Up-and-coming technology partner Diego Fernández is ‘very knowledgeable and responsive’.


They are well recognised in this field; I believe the best in Argentina.

Great service, quality advice and very smart lawyers.’

The team, led by Javier Etcheverry Boneo, is very business-savvy and well versed on the issues that concern digital platforms and the gig economy. They are determined to investigate matters further, and provide practical advice.’

Javier Etcheverry Boneo and Claudia Paluszkiewicz have been great advisors in navigating us through the maze of regulatory laws in the sector in Argentina, as well as providing pragmatic, down-to-earth advice, taking into consideration important business factors, and actual evidence as well. They are aware of business, and understand your specific needs.’

Diego Fernández was very knowledgeable and responsive and a pleasure to work with. I could not ask for a better external counsel.

Diego Fernández is very proactive and understands the needs of the clients.’

Key clients


Facebook / WhatsApp

América Móvil / Claro Argentina


Grupo Vila-Manzano / América TV





Advent International

Electricity Tier 2

Arguably best known for its corporate strength, Marval O’Farrell Mairal’s power practice also deserves credit for its robust commercial and regulatory expertise. Most notably, the energy group is working alongside the firm’s banking and administrative law teams to advise China Gezhouba Group on regulatory power issues and contract negotiation related to the development of the largest hydroelectric project under construction in the country. Sebastián Iribarne leads the electricity practice and has strong transactional experience. Francisco Macías heads the overarching energy department and is recommended for regulatory and transactional matters. Public law associate Gonzalo Santamaria is a talented rising star.

Key clients



Gezhouba Group

Interconexión Eléctrica (ISA)

Scatec Solar


Canadian Solar

Engie – Tractebel Energía


San Martin del Tabacal

Loma Negra






Sealed Air

Oil and gas Tier 2

Marval O’Farrell Mairal finds favour for its ability to bring an ‘out-of-the-box perspective’ to its oil-and-gas work. The experienced group is well versed across the full hydrocarbons supply chain, from exploration and production through to midstream and downstream issues. On the transactional side, the team kept busy advising on bid rounds, farm-in agreements and restructuring matters. It also has a prominent position in regulatory and contentious work, with recent roles on several high-profile disputes for companies such as Roch and Shell. High-profile figure Francisco Macías is an oil-and-gas expert, who advises on transactions, contracts and regulatory issues. M&A and capital markets partner Ricardo Beller is noted for oil-and-gas transactions. Senior associate Jimena Montoya is also recommended for her focus on energy work.


The firm approaches the main themes with an ‘out of the box’ perspective.’

The team is always available and ready to assist the client, regularly incorporating other internal teams if needed.’

We totally recommend Francisco Macías.

Key clients

ExxonMobil / Exxon

Royal Dutch Shell / Raízen Argentina

Compañía MEGA

Corporación América / Compañia General de Combustibles (CGC)


Engie (formerly, GDF Suez)



Transportadora de Gas del Sur (TGS) / controlling company Compañía de Inversiones de Energía (CIESA)

Schlumberger Argentina

Archer Well




Gasoducto Nor Andino

Gasoducto GasAndes

Litoral Gas

Tullow Oil


Searcher Seismic

TGS / Spectrum





Real estate Tier 2

Marval O’Farrell Mairal leverages its top-tier corporate practice to specialise in advising on transactional matters, particularly sale and purchase transactions, investment deals, real estate finance and leasing. It also has robust development expertise and its close relationships with key clients Hilton Hotels and property tycoon Edmond Safra underpins a significant proportion of that work. Corporate finance partner Hernán Slemenson co-heads the practice and spearheads much of the group’s activity in the hotel sector. Department co-head Diego Chighizola is an impressive up-and-coming real estate specialist.

Key clients

Hilton Hotels

InterContinental Hotel

Edmond Safra

Faena Group

Guggenheim Nicklaus Partners

Pegasus Real Estate


Bank of America Merrill Lynch

JPMorgan Chase Bank

ABN AMRO Bank (Argentina)

Nassef Sawiris (NNS)


Founded in 1923, Marval, O’Farrell & Mairal is the largest law firm in Argentina. A market leader at both local and Latin American levels, the firm has been providing sophisticated, high-quality advice to international and local clients for more than 95 years. The firm comprises over 300 lawyers and has wide experience of international business issues and the complexities of cross-border transactions.

Main areas of practice: Banking, finance and capital markets: credit facilities, trade finance, leasing. Trade, vendor, project, acquisition, structured real estate finance. Debt restructurings. Preferred stock, receivables, asset purchase programs. Debt, equity securities, securitizations, derivatives, synthetic products, financial trusts, mutual funds. Regulatory matters.

Bankruptcy/restructuring: advising creditors, shareholders, debtors and trustees from financial trusts in all types of proceedings in a range of sectors.

Commercial and competition: international trade law, commercial agreements and sale, purchase and leasing agreements. Antitrust and unfair competition issues. Product liability and consumer law.

Compliance, Anti-corruption & Investigations: compliance programmes, anti-corruption due diligence in M&A transactions, internal investigations,
and cases with regulatory authorities and the courts.

Corporate/M&A: M&A, private equity transactions, due diligence audits, planning and joint ventures, shareholder agreements, restructurings and spin-offs.

Employment: restructuring, collective bargaining and government/union negotiations. Employee stock options and benefit plans. Litigation.

Energy/natural resources: project financing/development, mining M&A, exploration permits and title rights. Oil and gas exploration, production, transportation, distribution, trading and marketing. Development/operation of pipelines, gas treatment facilities and power projects.

Environment: litigation, transactional, administrative and regulatory matters and contracts. Environmental audits and assessments and evaluation of environmental liabilities and remediation programs, M&A and real estate transactions.

Insurance/reinsurance: incorporation and acquisition of insurers, drafting and adaptation of insurance plans and policies to Argentine law and registration of foreign reinsurers and reinsurance brokers. Litigation.

Intellectual property: IP protection and management, transfer of technology and license agreements, international franchising agreements and licensing and registration of software. Protection of patents, utility models and ornamental design rights, trademark matters and worldwide trademark protection.

Internet & IT: advise internet start-ups on IP, tax, corporate structure and governance, employee benefits and executive and consultant compensation packages. E-commerce and internet-related issues. IT contracts, hardware contracts, software licensing, development and maintenance agreements, and outsourcing contracts.

Litigation and arbitration: civil and commercial litigation, administrative proceedings, arbitration and ADR. Enforcement of foreign judgments and awards in Argentina. Bankruptcy and creditors’ rights, including recovery of debts. International arbitration.

Public/administrative law: administrative law and regulatory matters, including litigation.

Real estate: sale, purchase and leasing agreements, structuring, financing and development.

Tax and customs: tax-efficient structures for transactions, strategic tax planning and innovative tax-driven products. Customs and dumping claims.

Telecommunications: regulatory and corporate matters, M&A and financing.

Department Name Email Telephone
Banking and finance Santiago Carregal
Banking and finance Gabriel Matarasso
Bankruptcy/restructuring Fernando Hernández
Competition Miguel del Pino
Compliance, Anti-corruption & Investigations Pedro Serrano Espelta
Corporate/M&A Pablo Artagaveytia
Employment Javier Patrón
Employment Enrique Stile
Energy/natural resources Francisco Macías
Energy/natural resources Luis Lucero
Insurance and reinsurance Pablo Cereijido
Insurance and reinsurance Elías Bestani
Intellectual property Iris Quadrio
Intellectual property Martín Bensadon
Litigation and arbitration Ricardo Ostrower
Public/administrative law Héctor Mairal
Public/administrative law M Lorena Schiariti
Public/administrative law Enrique Veramendi
Real estate Hernán Slemenson
Real estate Santiago Carregal
Tax and customs Horacio García Prieto
Tax and customs María Inés Brandt
Tax and customs Gabriel Gotlib
Tax and customs Walter Keiniger
Telecommunications Daniel Di Paola
Telecommunications Gustavo P Giay
Telecommunications Javier Etcheverry Boneo
Photo Name Position Profile
Mr Pablo A Artagaveytia  photo Mr Pablo A Artagaveytia Pablo A. Artagaveytia has been a partner at Marval, O’Farrell & Mairal…
 Patricia López Aufranc photo Patricia López Aufranc Her practice has focused on international financial and commercial transactions, mergers and…
Mr Ricardo W Beller  photo Mr Ricardo W Beller Ricardo W. Beller has been a partner of Marval, O’Farrell & Mairal…
 Martín Bensadon photo Martín Bensadon Martín Bensadon joined Marval, O’Farrell & Mairal in 1991 and has been…
Mr Elias F Bestani  photo Mr Elias F Bestani Elías F. Bestani specializes in shipping and maritime law, insurance and reinsurance…
Mr Cristian D. Bittel  photo Mr Cristian D. Bittel Cristian Daniel Bittel joined Marval, O’Farrell & Mairal in 2004 and became…
 Pablo Viñals Blake photo Pablo Viñals Blake Pablo Viñals Blake leads the Private Equity, Venture Capital and Agribusiness Groups.…
 María Inés Brandt photo María Inés Brandt María Inés Brandt is a partner of Marval, O’Farrell & Mairal Tax…
Mr Guillermo Burman  photo Mr Guillermo Burman His area of specialization is corporate and finance law. He gives legal…
 Martín Campbell photo Martín Campbell Martin Campbell joined Marval, O’Farrell & Mairal as partner in 2000. Since August…
Mr Santiago Carregal  photo Mr Santiago Carregal Santiago Carregal is the Head of the Banking and Finance Department and…
Mr Leandro M Castelli  photo Mr Leandro M Castelli Leandro M. Castelli joined Marval, O’Farrell & Mairal in 1994 and became…
Mr Pablo S Cereijido  photo Mr Pablo S Cereijido Pablo S. Cereijido joined Marval, O’Farrell & Mairal in 1993 and has…
Mr Martín G Chajchir  photo Mr Martín G Chajchir He specializes in intellectual property litigation with a focus on trademarks, domain…
Mr Diego A Chighizola  photo Mr Diego A Chighizola Diego Chighizola specializes in banking and finance, capital markets, M&A and real…
Ms Jazmine Daruich  photo Ms Jazmine Daruich Her current practice focuses on international trade, particularly antidumping investigations, import/export legal…
Mr Miguel Del Pino  photo Mr Miguel Del Pino Miguel specialises in competition law and is dedicated to the practice area.…
Mr Daniel Di Paola  photo Mr Daniel Di Paola Specialises in telecommunications and broadcasting, entertainment and corporate/M&A. He advises several key…
Mr Juan M Diehl Moreno  photo Mr Juan M Diehl Moreno Juan specializes in commercial, banking, foreign exchange control and capital markets law.…
 Ignacio Sánchez Echagüe photo Ignacio Sánchez Echagüe He specializes in industrial property and more particularly in patent law, having…
Mr Sergio M Ellmann  photo Mr Sergio M Ellmann Sergio M. Ellmann specializes in industrial property law, advising national and international companies…
Mr Javier Etcheverry Boneo  photo Mr Javier Etcheverry Boneo Javier Etcheverry Boneo specializes in business law, his practice includes M&A, corporate finance,…
Mr Diego Fernández  photo Mr Diego Fernández Diego Fernández is a technology expert, with 14 years of experience. His…
Mr Gonzalo J Fontana  photo Mr Gonzalo J Fontana Gonzalo Fontana specializes in litigation and commercial and corporate law. Within this…
Mr Gabriel A. Fortuna  photo Mr Gabriel A. Fortuna Gabriel A. Fortuna has a strong focus on environment law. He has…
Mr Rodrigo F García  photo Mr Rodrigo F García An expert in procedure law, he specializes in commercial and corporate law…
Mr Pablo Garcia Morillo  photo Mr Pablo Garcia Morillo Pablo García Morillo specializes in business and corporate law and his professional…
Mr Pablo Gayol  photo Mr Pablo Gayol Pablo J. Gayol specialises in international trade and has particular expertise in…
Mr Gustavo P Giay  photo Mr Gustavo P Giay Gustavo P. Giay specialises in IP litigation and leads the work of…
Mr Gabriel Gotlib  photo Mr Gabriel Gotlib Gabriel Gotlib specializes in tax, corporate and financial law. He has broad…
 Fernando Hernández photo Fernando Hernández Fernando Hernández specializes in corporate matters, finance, capital markets and insolvency. His…
Mr Sebastián M Iribarne  photo Mr Sebastián M Iribarne Sebastián M. Iribarne specializes in banking, finance and corporate law. His practice…
Mr Walter C Keiniger  photo Mr Walter C Keiniger His practice involves counseling local and foreign companies in the design, planning…
Mr Diego S. Kelly  photo Mr Diego S. Kelly Diego S. Kelly provides full employment advice to multinational and local corporations,…
Mr Diego Krischcautzky  photo Mr Diego Krischcautzky His practice is focused on commercial, corporate and insurance law. He has…
Mr Juan M. López Mañan  photo Mr Juan M. López Mañan Juan M. López Mañán specialises in trademarks and domain names and has…
 José María Llano photo José María Llano His practice has focused on Labor and Social Security Law and he…
Mr Luis E Lucero  photo Mr Luis E Lucero He practices law in the fields of natural resources (with a focus…
Mr Francisco A Macias  photo Mr Francisco A Macias Francisco A. Macías specializes in oil & gas, power, public services, infrastructure,…
 Héctor Mairal photo Héctor Mairal An expert in administrative and business law, he has been involved in…
Ms Cecilia M Mairal  photo Ms Cecilia M Mairal Her professional practice is centered on giving companies and banks general advice…
Mr Gabriel G Matarasso  photo Mr Gabriel G Matarasso His areas of specialization include corporate, commercial, finance and capital markets, both…
Mr Alberto D Q Molinario  photo Mr Alberto D Q Molinario Alberto D. Q. Molinario has more than 30 years’ experience. He specialises…
Mr Fernando M Montes de Oca  photo Mr Fernando M Montes de Oca He is specialized in litigation and dispute resolution in the civil and…
Mr Gustavo Morales Oliver  photo Mr Gustavo Morales Oliver Gustavo Morales Oliver specializes in advising international clients on Compliance & Investigations…
Mr Martín J. Mosteirin  photo Mr Martín J. Mosteirin Martin provides legal advice (both contentious and non-contentious) to leading multinational companies on…
Mr Luciano M Ojea Quintana  photo Mr Luciano M Ojea Quintana He specializes in banking, commercial and corporate law and in capital markets.…
Mr Ricardo A Ostrower  photo Mr Ricardo A Ostrower Ricardo A. Ostrower is the head of the Litigation and Arbitration Department in…
Mr Alfredo M O’Farrell  photo Mr Alfredo M O’Farrell Alfredo specializes in general corporate and company law, M&A, privatizations, “shareholders disputes”…
Mr Miguel O’Farrell  photo Mr Miguel O’Farrell Miguel O’Farrell joined Marval, O’Farrell & Mairal in 1963 and as a…
 Javier Patrón photo Javier Patrón Javier Enrique Patrón is responsible for the firm’s labor and social security…
Mr Arturo Pera  photo Mr Arturo Pera Arturo Pera joined Marval in 2016 as Of Counsel in the Oil…
Mr Iván A Poli  photo Mr Iván A Poli Iván Poli specialises in IP law and advises foreign and domestic clients…
 Horacio García Prieto photo Horacio García Prieto He is an expert on tax and customs law and has advised…
Ms Iris V Quadrio  photo Ms Iris V Quadrio Iris V. Quadrio specialises in IP law, with extensive experience advising domestic…
Mrs Barbara V Ramperti  photo Mrs Barbara V Ramperti Bárbara Ramperti specializes in commercial and corporate law. She has advised clients…
Mr Leonardo G Rodriguez  photo Mr Leonardo G Rodriguez Leonardo G. Rodríguez is a mining specialist with more than 15 years’…
Mr Juan Pablo Rothschild  photo Mr Juan Pablo Rothschild Specialises in tax and customs planning and litigation
 María Lorena Schiariti photo María Lorena Schiariti As a specialist in Administrative Law, she works in matters of great…
Mr Pedro Serrano Espelta  photo Mr Pedro Serrano Espelta Pedro Serrano Espelta specializes in corporate law, M&A, Oil & Gas and…
Mr Roberto Silva Jr  photo Mr Roberto Silva Jr He specializes in corporate, commercial and banking law. Within his area of…
 Hernán Slemenson photo Hernán Slemenson Hernan Slemenson has participated as legal advisor in a broad range of…
Mr Rodrigo Sola Torino  photo Mr Rodrigo Sola Torino Rodrigo Solá Torino’s practice focuses on advising in labor & employment matters,…
Mr Santiago Soria  photo Mr Santiago Soria Santiago Soria has vast experience in complex commercial litigation, including disputes among…
Mr Enrique M Stile  photo Mr Enrique M Stile He specializes in labor and employment law. His practice in the firm…
Mr Fernando M Vaquero  photo Mr Fernando M Vaquero Specialises in taxation issues related to M&A, financing, business restructuring, real estate…
Mr Enrique Veramendi  photo Mr Enrique Veramendi He provides advice on public law, economic regulation and administrative contracts to…
Mr Facundo Viel Temperley  photo Mr Facundo Viel Temperley A member of the Litigation Department, he specializes in procedural law and…
 Andrés Villarreal photo Andrés Villarreal Andrés Villarreal has unique experience in mining M&A and the acquisition of…
Mr Santiago del Rio  photo Mr Santiago del Rio Santiago specialises in competition law and has recently handled merger control matters…
Other fee-earners : 265
Total staff : 618
Partners : 64