Bertha Argüello

Partner, Nicaragua


  • Bertha M Argüello has been part of the firm since 2003 and advises clients in banking and finance, corporate and commercial and mining matters, she has coordinated and advised in the opening and acquisition of several banks and financial institutions in Nicaragua, as well as acting as counsel in restructuring, regulatory and compliance matters. She has also advised on both local and international corporations in financing and investment transactions as well as security structuring in the country and the Central American region.
  • Bertha has also been legal advisor to local companies and foreign entities looking to invest in Nicaragua, including assisting on labor and organizational matters. She has been a member of the board of a supervised financial institution since 2016, as well as its risk and compliance committees, representing client interests and contributing to strengthening the entity’s presence nationwide. Bertha also advises clients on complex financing arrangements and security structures for both regulated and non-regulated entities. Her experience also includes working in Arias’ expanding labour department, advising clients on diverse employment matters, as well as general management and corporate solutions.
  • She holds a masters degree in law from Harvard Law School and a Juris Doctor degree from Universidad Autónoma Centroamericana in San José, Costa Rica. Bertha has been an authorized attorney and notary public in Nicaragua since 2000.


  • Law degree from the Universidad Autonoma de Centro America in San José, Costa Rica.
  • Authorized to practice law and as a Notary Public in Costa Rica and Nicaragua.
  • Master of Laws degree from Harvard University School of Law. 

  • Recognized as Attorney of the year - Finance, by The Latin America Lawyer.
  • Recognized as Market Leader by IFLR1000.
  • Bertha has been ranked in the Band 1 category for her practice in the Corporate/Commercial department by the prestigious guides, Chambers Global and Chambers Latin America.
  • LACCA Approved by her banking and finance practice.
  • Recognized as one of the Women Leaders by IFLR1000.
  • Leading Lawyer in The Legal 500.
  • Ranked by Whos Who Legal by her practices in: Banking, Finance and Projects, Corporate, Environment, Energy and Natural Resources, Insurance and Reinsurance.


  • International Bar Association (IBA)

Client's feedback

  • Co-head of department Bertha Marina Argüello de Rizo is continually recognised for her capabilities in representing clients in finance-related cases. An interviewee enthusiastically notes: "She provides a great service." Bertha Marina Argüello de Rizo is regularly found advising key domestic and international financial institutions on debt restructuring matters. - Chambers and Partners Latin America
  • Corporate and commercial department co-head Bertha Marina Argüello de Rizo is lauded by a market commentator as "an experienced and knowledgeable lawyer." She is exceptionally skilled at handling finance mandates, regularly assisting major multinational and domestic financial institutions with high-value credit facilities and bond issuances. She also excels at representing clients in complex debt restructuring matters. – Chambers and Partners Global
  • Bertha Argüello is commended for the breadth of her experience advising multinationals on complex financial transactions and banking regulation. – Who’s Who Legal
  • Bertha Argüello is held in high esteem for her top-tier practice, which spans the gamut of banking, finance and insurance matters. – Who’s Who Legal
  • Bertha Argüello is a well-known player in the corporate space who excels in advising clients on mining law issues. – Who’s Who Legal
  • Peers applaud Bertha Argüello's substantial transactional experience in finance, banking and corporate matters. – Who’s Who Legal
  • "She is a longstanding figure in the corporate market". - Chambers and Partners Latin America 2023.

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