Mariana Duarte

Senior Associate Lawyer | Lisbon

Practice Areas
Litigation and Arbitration
Art & Entertainment
Private Clients & Family Businesses
  • English
  • French

Mariana Duarte is a Senior Associate since 2020 and has been at Abreu Advogados since 2013, she works primarily in the areas of dispute resolution and arbitration.

She focuses particularly on litigation matters, including corporate, contract, divorce and parental responsibility, inheritance and labour. She is involved in a number of arbitrations, judicial, injunction and breach of contract proceedings before Portuguese courts and international commerce chambers (ICC).

Her experience includes assisting clients in matters related to telecommunications contracts, construction works, investment funds, estate, administrative offenses and penal procedures, recognition and enforcement of foreign judgements as well as providing support in Portugal for proceedings underway in foreign jurisdictions such as the United Kingdom, Germany and Angola.



Advising on an arbitration case related to investment funds and the economic crises.

Advising on an arbitration proceeding regarding a shareholder dispute on the shareholders agreement related to different legal jurisdictions.

Advising on a transactional dispute related to aviation.

Advising on a litigation proceeding related to unfair competition involving football clubs.

Advising on proceedings to recognize and enforce foreign sentences in the jurisdiction of Portugal.

Advising on divorce and parental responsibility.

Advising on a penal proceeding related to intellectual property.

Advising on contract amendments and preparation of terms and conditions for a website.

Advising on labour and environmental offense  proceedings, among others.

Advising on consumer related litigation.



Lisbon University

Law Degree from Lisbon University Faculty of Law (2012)

Portuguese Catholic University

Master of Laws from the Portuguese Catholic University Faculty of Law (Merit Scholarship as the top student in the academic portion of her Master of Laws, (2015)

Lisbon University

Postgraduate Diploma in Corporate Litigation from Lisbon University Faculty of Law