Mr José María Llano > Marval O’Farrell Mairal > Buenos Aires, Argentina > Lawyer Profile

Marval O’Farrell Mairal
José María Llano photo

Work Department

Labour & Employment


His practice has focused on Labor and Social Security Law and he has specialized in providing advice to different types of businesses on labor law, be it mergers and acquisitions, employee transferal, restructuring of staff or termination agreements for key employees. He has extensive experience in collective labor law and has participated actively in negotiating labor collective bargaining agreements with union bodies and in negotiating and solving collective conflicts while representing the firm’s clients.


From 1986 to 1990 he practiced in the Argentine National Judiciary and from 1991 he has specialized in labor law.


English & Spanish.


He graduated from the Universidad Católica Argentina en in 1996.

Lawyer Rankings

Argentina > Labour and employment

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.