New York, NY – April 6, 2026 – Dunning Vallejo & MacDonald LLP, a boutique dispute resolution and corporate transactional law firm based in New York City, announced today that Margarita Oliva Sainz de Aja will join the firm as a partner effective April 1, 2026.
Ms. Oliva brings more than 20 years of experience in corporate finance and general corporate law in New York City. She advises financial institutions and corporations on complex financing and commercial transactions across the Americas and is widely recognized for her work on cross-border matters involving Spain and Latin America. Her practice has included project finance, bank finance, capital markets, and corporate transactions, including cross-border mergers and acquisitions, restructurings, and outsourcings, for clients ranging from multinational financial institutions to major corporates.
Over the course of her career, Ms. Oliva has represented businesses from Spain and Latin America in a broad range of financing transactions and strategic deals, helping clients navigate differing legal systems, regulatory environments, and market practices. She is known in the market for combining deep technical knowledge with a practical, business-focused approach and for her ability to lead multi-jurisdictional teams on sophisticated cross-border transactions.
“We are very fortunate that my good friend Margarita Oliva has joined our firm as a partner. Her deep knowledge of the Spanish and Latin American markets and her reputation for excellent client service will help us to further develop the transactional side of our growing law firm,” said founding partner Brian Dunning.
For her part, Ms. Oliva said, “I am very excited to have joined the impressive team at Dunning Vallejo & MacDonald. I am confident that my clients will continue to be well-served in a firm like DV&M that has an unrelenting focus on the Spanish and Latin American markets.”
About Dunning Vallejo & MacDonald LLP
Dunning Vallejo & MacDonald LLP is a boutique dispute resolution and corporate transactional law firm in New York City. Founded in 2019 by former Big Law partners, the firm has grown to more than a dozen legal professionals who handle complex financing transactions, mergers and acquisitions, international arbitration, and litigation, and has been recognized in those areas by Chambers and Partners’ Regional Spotlight ranking in New York. The firm is particularly focused on matters involving clients and counterparties from Latin America, Spain, the United Kingdom, France, and other European jurisdictions, offering integrated dispute resolution and transactional capabilities in those markets.
For more information, please contact:
Brian Dunning, Founding Partner
Dunning Vallejo & MacDonald LLP
Email: bdunning@dvmlaw.com
Phone: (646) 873-7522
