MH Moreno Hueyo

Moreno Hueyo | Law Firm

Advising domestic and international companies on sophisticated and complex legal matters.

Capability, experience and results are the foundations upon which we build Moreno Hueyo. Our team combines a solid academic background with extensive professional track records. Having graduated from leading universities in Argentina, pursued postgraduate studies and LL.M. degrees abroad, and trained within top-tier law firms and companies, we bring a broad legal perspective on business that allows us to deliver comprehensive and effective services.

We are committed to understanding our clients’ needs with empathy and precision, enabling us to anticipate challenges and design tailored strategies. By working with dedication and a results-driven approach, we aim to build strong, long-term relationships and consistently deliver legal services of the highest quality standards.

Partner – Marcos Moreno Hueyo is engaged in this area of practice. Based in the City of Buenos Aires, Argentina.

He advises mining clients engaged in copper, gold, silver and lithium projects across several Argentine provinces, including Salta, Catamarca and San Juan, as well as greenfield developments in La Rioja and Mendoza. His expertise extends to supporting both junior and large-scale mining companies at every stage of development, from exploration and construction through to exploitation and closure.

He has acted on project acquisitions, operational financing, exploration agreements, and environmental permitting and approvals. In environmental matters, he advises on Environmental Impact Assessments (EIAs), Environmental Impact Statements (EISs), consultation and public hearing processes, compliance with mitigation and remediation strategies, and authorisations for water use. With extensive experience assisting international clients, he is well attuned to regulatory, compliance and reporting challenges.

Partner – Juan Vignolo is engaged in this area of practice. Based in the City of Buenos Aires, Argentina.

He advises domestic and international clients on complex financing structures, capital markets operations and cross-border transactions. His practice covers project and acquisition finance, structured funding solutions and strategic capital-raising initiatives. He also assists foreign investors and private equity funds in evaluating, structuring and executing local investment opportunities with efficiency and legal integrity.

Partners – Juan Vignolo and Tomás Martínez Casas are engaged in this area of practice. Both are based in the City of Buenos Aires, Argentina.

They advise domestic and international clients on mergers, acquisitions, joint ventures, spin-offs and corporate reorganizations. Their practice spans the full deal lifecycle—from due diligence and structuring to negotiation and post-closing integration. They are recognized for providing pragmatic, business-oriented advice, and for their ability to handle complex cross-border transactions and shareholder disputes with strategic commercial insight.

They have participated in various industries, ranging from M&A in natural resources to the sports and entertainment industries.

Offices

Our offices are located in Libertad 836, 2nd Floor, City of Buenos Aires, Argentina.

Phone number: (+5411) 5555-1444

Email: [email protected]