Pilar Colomés Íess

Pilar Colomés Íess

GNCI Law

Pilar Colomés Iess is a dual New York and Spanish-qualified attorney and a founding partner of GNCI Law. A graduate of Columbia University (LLM), she has over 15 years of experience representing corporations, investors, and states in investment and commercial arbitration and complex transnational litigation cases. Pilar has worked with some of the world’s most prestigious legal organisations, including the Permanent Court of Arbitration in The Hague, Herbert Smith Freehills in London, and Kirkland & Ellis in New York. She is recognised for her expertise navigating complex procedural disputes in international arbitration and transnational disputes involving, among others, joinder of third parties, conflict of laws, conflicts of forum, cross-border discovery, enforcement and annulment of awards. Pilar’s trajectory accumulates various successful cases such as the representation of the Kingdom of Spain in the first two PV-saga investment arbitrations, and various successful commercial and cross-border litigations in Europe and the Americas. Pilar often participates as a panellist and lecturer at leading universities (Harvard University, New York University, Universidad Pontificia Comillas (ICADE), Universidad Francisco Marroquín) and international law associations and is a frequent contributor to arbitral and academic institutions.

Pilar Colomés Iess is a dual New York and Spanish-qualified attorney and a founding partner of GNCI Law. A graduate of Columbia University (LLM), she has over 15 years of experience representing corporations, investors, and states in investment and commercial arbitration and complex transnational litigation cases. Pilar has worked with some of the world’s most prestigious legal organisations, including the Permanent Court of Arbitration in The Hague, Herbert Smith Freehills in London, and Kirkland & Ellis in New York. She is recognised for her expertise navigating complex procedural disputes i...

Publications

Commercial Litigation Law Guide

Author of the Spain chapter in the Commercial Litigation Law Guide , published 19 May 2026 .

Arbitration Law Guide

Author of the Spain chapter in the Arbitration Law Guide , published 3 June 2025 .