• Counsel to multiple banks in all international bond offerings made by the Province of Buenos Aires between 1997 and 2001
  • Between 2002 and 2006, counsel to Citigroup and the Province of Buenos Aires (PBA) in PBA's US$2.8 billion debt restructuring. Marcelo remained counsel to PBA in all bond offerings made thereafter 
  • In 2003-2004, counsel to JP Morgan in the debt restructuring of a US$250 million bond issued by the Province of Mendoza and to Barclays Capital on the reopening made in 2007 
  • Issuer and underwriter's capital markets counsel in transactions for the Provinces of Buenos Aires, Chaco, Chubut, Formosa, Entre Ríos, La Rioja, Mendoza, Neuquén, San Juan, Santa Fe and Salta 
  • Underwriter's counsel for UBS, Citi, Beal West LB, Salomon Brothers, Credit Suisse, Raymond James, Deutsche Bank, Barclays, JP Morgan and other banks on corporate debt and equity offerings  
  • Special counsel to Pioneer and Apache on the US$600 million acquisition of Pioneer Natural Resources' assets in Argentina, among other notable acquisitions 
  • Counsel to GP Investments, Temasek and LAIG in the US$1 billion acquisition of Pride International’s assets in Latin America 
  • Counsel in the sale of British Gas equity interest in MetroGAS one of the largest natural gas distributors in Latin America  
  • Buyer's counsel in two attempts to acquire YPF