Stephan Adell


Santo Domingo, Dominican Republic
Calle Rafael Augusto Sánchez # 86 
Roble Corporate Center, 7th floor
+1 809 792 5200
Download CV
  • LinkedIn
Stephan (transparent background).png

A dual Bolivian-French national with over 15 years of international arbitration experience, Stephan Adell’s practice focuses on international commercial and investment arbitration.  He has intervened in over 90 arbitrations, particularly focusing on complex construction and investor-State disputes.  He also acts as arbitrator.


Stephan has acted under major arbitration rules and institutions such as the International Centre for Settlement of Investment Disputes (ICSID), the United Nations Commission on International Trade Law (UNCITRAL), the International Chamber of Commerce (ICC), the London Court of International Arbitration (LCIA), the Dubai International Arbitration Centre (DIAC) and the International Centre for Dispute Resolution (ICDR). 


He advised 6 States in 11 international disputes and has acted as counsel in more than 30 investment arbitrations.  In Latin America, Stephan has acted in arbitrations in Bolivia, Chile, Costa Rica, Dominican Republic, Ecuador, Guatemala, Mexico, Peru, and Venezuela.  


Stephan was a member of the International Arbitration Court of the ICC for 6 years.  Before founding Adell & Merizalde, he worked at two top-tier firms in international arbitration (Paris and Dubai offices).  


He is a member of the ICC Commission on Arbitration and ADR and teaches Alternative Dispute Resolution at Pontificia Universidad Católica Madre y Maestra.


Stephan is consistently recognized by Who’s Who Legal, The Legal 500, Global Arbitration Review, Best Lawyers, and Latin Lawyer. 


Screen Shot 2022-04-22 at 2.37.06 PM.png

Bar Admissions

  • Dominican Republic

  • Paris


  • Université de Versailles, Master International Law and International Arbitration 

  • Université Paris 2, Panthéon-Assas, Diploma in Comparative Law 

  • Pontificia Universidad Católica Madre y Maestra, Law Degree 


  • Spanish

  • English

  • French

Relevant Matters

  • Central American State in an ICSID arbitration against a Spanish investor related to the closure of the investor’s food production facilities.  Over US$ 100 million in dispute.  

  • South American State in a PCA investment arbitration under UNCITRAL rules initiated by a US investor concerning the modernization of an oil refinery.  Over US$ 110 million in dispute. 

  • South American State in 2 ICSID arbitrations initiated by a group of Spanish-Italian companies arising from the construction of a railway for a metro project.  Over US$ 1,2 billion in dispute. 

  • Eastern European State in an ICSID arbitration initiated by a German investor concerning the tender for the privatization of the postal communication authority.  Over US$ 400 million in dispute. 

  • Middle East country in an ICSID arbitration brought by investors from the Netherlands for the sale of assets of a large mobile phone company.  Over US$ 19 billion in dispute. 

  • Eastern European State in 2 arbitrations (PCA and ICSID) against a Hungarian investor relating to various regulatory measures on a gas trading business.  Over US$ 1 billion in dispute.  

  • South American public entity in an ICC arbitration against a US services supplier for goods relating to oil & gas drilling.  Over US$ 250 million in dispute.  

  • Middle Eastern company in an ICC arbitration against a European enterprise concerning design defects and delays in the construction of an MDF plant.  

  • European public entity in an ad hoc arbitration against a South American constructor regarding defects and delays in the construction of a highway. 

  • Latin American public entity in 3 ICC oil & gas arbitrations.  Over US$ 300 million in dispute.