• Search
Guillermina Ester

Guillermina Ester


Guillermina joined Pérez-Llorca in 2005, after practising law for five years in the litigation and arbitration department of a major US law firm. In January 2010 she was named partner. Guillermina is an expert in complex civil and commercial litigation and arbitration matters. She has advised both national and international companies in pre-litigious and litigious matters (before tribunals of all instances) and has participated in national and international arbitrations of a commercial and investment nature.

Her experience encompasses dealing with disputes related to distribution agreements, construction defects, financial derivatives, corporate conflicts, reps and warranties, syndicated credit facilities, energy, telecommunications, real estate, state investment, civil liability and all types of contractual disputes in general. With regard to arbitration, Guillermina formed part of the legal team that represented Spanish companies against Latin American governments before the ICSID, regarding arbitration claims filed for an infringement of bilateral investment treaties.

Guillermina regularly writes articles for national and international publications. She contributed to the Arbitration Code (‘Código de Arbitraje’, Aranzadi, second edition, 2009), a volume compiling and commenting on statutory materials and rules on arbitration. In addition, Guillermina regularly lectures for courses on procedural law and arbitration, as well as postgraduate programmes.

Guillermina is also a member of the Spanish Arbitration Club.