Ms Juan Manuel Mercant > Guyer & Regules > Montevideo, Uruguay > Lawyer Profile

Guyer & Regules
Juan Manuel Mercant photo

Work Department

Corporate / M&A and Banking


Juan Manuel Mercant, lawyer. Expert in Banking & Finance, Energy & Infrastructure and Antitrust.

Experience in huge project finance transactions (assisting lenders or sponsors) and major competition cases.

Partner at Guyer & Regules.


Professor of “Energy  & Regulation”, Catholic University of Uruguay.

Pérez Alati, Grondona, Benites, Arntsen & Martínez de Hoz – Buenos Aires (1999).

Cleary, Gottlieb, Steen & Hamilton, New York, (2000 – 01).


Spanish, English


Member of the Uruguayan Bar Association since 1999, Officer of the Latin American Regional Forum of the IBA since 2015. Board member of the Jesuit Foundation since 2016 (education).

Member of the Energy Think Tank of the Catholic University.


School of Law, University of Uruguay, 1997

Lawyer Rankings

Uruguay > Banking and finance

Guyer & Regules‘s banking and finance practice operates in the top tier of the space; the team’s contributions are ‘timely and of a high standard’, and its lawyers demonstrate ‘excellent knowledge of the market’ and maintain ‘a good relationship with the client. The group’s expertise encompasses securitisations, project finance and PPPs, sovereign debt issuances, fintech and day-to-day banking matters. It represents a substantial chunk of the private banks active in the country, as well as non-bank lenders and insurance companies. Three partners co-head the team: Álvaro Tarabal leads on banking transactions and project finance; Nicolás Piaggio is skilled at high-profile financings and capital markets matters; and Nicolás Herrera completes the leadership trio. Marcos Payssé advises foreign banks, while Juan Manuel Mercant and Federico Piano stand out in project finance transactions. Florencia Castagnola brings fintech expertise to the table, and the ‘excellentGuzmán Rodríguez garners praise for his professional manner and ‘creative solutions’.

Uruguay > Projects and energy

(Hall of Fame)

Juan Manuel MercantGuyer & Regules

Guyer & Regules is a key player in the Uruguayan projects and energy market, with a dedicated team that is recognised by clients for its ‘technical skill, extensive experience and detailed regulatory knowledge’. The practice group is active across the spectrum of projects and energy work – in the projects arena, its expertise encompasses public and private power purchase agreements, PPPs (primarily for the construction of highways and educational facilities), concession agreements and project financing, among other areas. The team has a strong track record in hydrocarbons, as well as wind and solar projects. Practice co-heads Juan Manuel Mercant and Federico Susena lead on oil and gas, renewable energy and infrastructure projects, and are praised for their ‘outstanding performance, teamwork and professional skills’. Marcos Payssé assists lenders, developers, agents and sponsors with infrastructure and energy projects; Federico Piano assists developers and financers at all stages of project finance deals; and at associate level, Javier Napoleone and Tania Cavallo are the names to note.