Expert with over 30 years of experience leading Spanish and international arbitration and court proceedings; specializing in international arbitration, mainly concerning the construction, engineering and energy sectors, and litigation involving civil liability.

Alfonso Iglesia has extensive experience as a lead lawyer in national and international arbitration and court proceedings in a wide range of matters. He particularly specializes in construction, engineering, energy and civil liability.

He has represented clients in disputes relating to the implementation of projects in many countries, including Spain, Portugal, Romania, Bulgaria, Mexico, Colombia, Peru, Chile, Panama, Dominican Republic, Ecuador, Morocco and Saudi Arabia. His advisory services range from the contract negotiation phase to defending clients in courts of justice and arbitration courts, including negotiation procedures, mediation, expert determination and disputes boards. He also serves regularly as an arbitrator.

He has participated in ad hoc and UNCITRAL arbitrations, and arbitrations administered by the main international arbitration courts (e.g., ICC, CIADI, CPA) and Spanish arbitration courts (e.g., Court of Arbitration of Madrid, CIMA and TAB).

He is president of the Spanish and Iberoamerican Arbitration Club and one of the two members for Spain of the Court of Arbitration designed by the International Chamber of Commerce (ICC World Council). He is also a fellow of the International Academy of Construction Lawyers, and a member of the Chartered Institute of Arbitrators, the ICC Institute of World Business  Law and the International Bar Association. He is also the secretary of the board of directors of the Spanish branch of the International Law Association.

He speaks regularly in specialized courses and at seminars  on dispute resolution, arbitration and construction. He has participated in several publications and collective works on arbitration and construction.

He also lectures in the Master in Business Law at Universidad Pontificia Comillas-ICADE in Madrid.


  • Bachelor of Laws
    Universidad Complutense de Madrid (CEU San Pablo), 1987

    Advanced Management Program
    IESE Business School, Madrid, 2005

Directory Mentions

Recommended lawyer
Chambers & Partners (Global and Europe), Legal 500, Latin Lawyer, Leaders League, Expert Guides, European Legal Experts, Benchmark Litigation, Global Arbitration Review, Best Lawyers and Who’s Who in Litigation, Arbitration, Dispute Resolution, Product Liability, International arbitration, Arbitration & Mediation, Mass Tort Litigation and Real Estate & Construction

Global Leader
Who's Who Legal in Construction (2023, 2022)

Lawyer of the Year
Best Lawyers in International Arbitration (2023)

Lawyer of the Year
Benchmark Litigation Europe Awards in Dispute Resolution (2020)