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Internationl ENG

International litigation & arbitration

Sygna, under the direction of its partners, Professor Jean-Marc Thouvenin and Andrés Villegas, acts as a counsel and advocate for sovereign States in public international law disputes before numerous international courts and tribunals. It also assists public operators, companies, and individuals in their transnational disputes. In recent years, Sygna Partners has represented African, Middle Eastern, Asian, Latin American and European States before the International Court of Justice, the Permanent Court of Arbitration, the Inter-American Court of Human Rights, the International Tribunal for the Law of the Sea, the Court of Justice of the European Union, and Annex VII Tribunals constituted under UNCLOS.

Our team :

• Our expertise 


  • Assessment and prognosis of international disputes;

  • Examination of the possible and appropriate forum for the settlement of each dispute;

  • Assistance in the constitution of the advisory team and respective coordination of the team.

  • Handling of the casefile.

  • Drafting of diplomatic and procedural letters and communications.


  • Preparation of written and oral pleadings;

  • Legal and evidentiary research;

  • Representation and advocacy at hearings;

  • Assisting in out-of-court negotiations and parallel dispute settlement mechanisms;

  • Implementation and enforcement of judgments and awards, including before national courts.


  • Formatting and printing.

  • Follow-up and filing of written pleadings within time-limits;

  • Organisation of hearings before international courts and tribunals

  • Setting up and managing an ad hoc data room for each case;

  • Cost-effective management of financial matters related to each case.

• Our news

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