Margarita Oliva Sainz de Aja > DLA Piper LLP (US) > New York, United States > Lawyer Profile

DLA Piper LLP (US)
1251 6TH AVE,
NEW YORK, NY 10020-1104
United States

Work Department





Margarita Oliva Sainz de Aja serves as Regional Head of Banking and Finance – Latin America. She advises financial institutions and corporations on financing and commercial transactions across Latin America.

Margarita has 25 years of extensive experience in project finance matters, particularly in helping major multilateral agencies, commercial financial institutions, sponsors, project companies and ECAs to structure and negotiate complex, multijurisdictional infrastructure and energy transactions. She also advises on a variety of general bank finance, capital markets and corporate transactions, including cross-border mergers and acquisitions, restructurings and outsourcings. Margarita Oliva Sainz de Aja is a partner of DLA Piper Argentina, resident in DLA Piper’s New York office.


English, French, Italian, Portuguese, Spanish


Andean Association; Women in Leadership in Latin America (WILL); Spain-US Chamber of Commerce


LL.M., Harvard Law School; J.D., Universidad de Granada; Universita degli Studi di Bologna

Lawyer Rankings

Peru > Banking and finance

DLA Piper Perú is able to draw on expertise from its vast global network (such as the firm’s New York-based head of banking and finance in Latin America, Margarita Oliva Sainz de Aja) to handle cross-border deals with ease. Experienced in both transactional and regulatory matters, the nine-strong Lima-based group advises borrower and creditor clients across all types of financings  and associated matters, and also handles a fair amount of cross-over work in the corporate arena, including M&A and reorganisations for banks, finance entities, insurance companies and investment fund managers. With over 20 years’ experience in capital markets and banking matters, Sergio Barboza co-heads the team in conjunction with Ricardo Escobar, who handles financing transactions and projects work and is experienced in the infrastructure, telecoms, energy, mining, and oil and gas sectors, among others. A strong senior-associate bench includes Melissa Padilla (financings, refinancings and debt restructuring along with corporate and transactional matters, as well as particular expertise regarding development and multilateral-finance agencies’ processes, policies and requirements); Reyna Silva-Santiesteban (focused on projects matters, she has notable expertise in financial structuring; Farah Torres (whose practice centres on regulatory matters concerning the financial system, stock market and insurance) and transactional practitioner Juan Carlos Ramírez Malatesta.

Latin America: International firms > Banking and finance

DLA Piper LLP (US) has maintained a steady flow of energy and infrastructure financing engagements, while also remaining active in debt restructurings across the region. It continues to represent a range of international banks, multilaterals and DFIs, and Latin American borrowers. The firm’s extensive network of offices in Latin America itself, plays a key role in many of its headline matters, including a number of recent debt restructuring engagements. New York partner Margarita Oliva Sainz de Aja is co-regional head of banking and finance for Latin America, and is an experienced figure in project finance. Lima partner Sergio Barboza is the other co-regional head, while San Diego’s Raul Farias provides further project finance expertise in the energy and infrastructure fields. San Juan partner José Sosa-Lloréns has extensive financial services regulatory expertise. However, project finance specialists Amala Nath and  Dino Barajas moved to Morrison Foerster (July 2021) and Baker Botts L.L.P. (January 2022), respectively (Nath has subsequenly become assistant General Counsel at the International Development Finance Corporation, as of July 2022). Agency finance practitioner Gregory Smith  has also left the firm.

Latin America: International firms > Projects and energy

DLA Piper LLP (US) has a large team of projects and energy specialists based in a large number of its US and Latin America offices. The group operates in multiple market-segments from conventional power and renewables, to gas pipelines and PPP projects. Much of the practice centres on project sponsors and developers. Bringing together teams from Miami, San Juan (Puerto Rico), New York, Washington DC, San Francisco, Baltimore, Chicago, Northern Virginia, Austin and San Diego, the firm continued to advise LUMA Energy, as winning bidder on the $1.6bn PPP transaction to operate and maintain the transmission and distribution assets of the Puerto Rico Electric Power Authority (PREPA). The firm’s Santiago office has also landed a series of important engagements, as have the Mexico City and Buenos Aires offices. New York partner Margarita Oliva Sainz de Aja is especially active in Latin America project finance, Felipe Bahamondez and newly promoted partner Diego Peña impress in Santiago, and Edgar Romo is a senior figure in Mexico City. San Diego and New York-based Raul Farias has an extensive record in energy transactions. Dino Barajas left for  Baker Botts L.L.P. in January 2022.