Mr Alvaro Nistal > Volterra Fietta > London, England > Lawyer Profile

Volterra Fietta

Work Department

Public International law




Álvaro Nistal qualified as a Spanish lawyer in 2006.  In 2019, he also qualified as a Solicitor of the senior courts of England and Wales.

In May 2019, he was promoted to Counsel at Volterra Fietta, having joined the firm seven years earlier in 2012. 

From 2011 and 2012, he worked at the International Arbitration Group of Shearman and Sterling in Paris. 

Before that, he worked for three years as an associate at the Madrid office of the international maritime law firm, Amya Abogados, where he represented clients in international commercial arbitrations and mediations and in judicial proceedings before Spanish courts.

At Volterra Fietta, he advises private entities, States and international organisations on a wide range of contentious and non-contentious public international law matters.  

His contentious experience includes representing and providing States in Africa, Latin America, the Middle East and Southeast Asia with legal advice in relation to proceedings before the International Court of Justice, providing States and individuals with advice in relation to proceedings before the Inter-American Court of Human Rights, representing foreign investors and States in high-profile investment treaty arbitrations, representing applicants and respondents in ICSID annulment proceedings, representing States in domestic judicial proceedings on sovereign immunity matters and representing private entities in international commercial arbitrations as well as in domestic judicial proceedings regarding the enforcement of arbitral awards.

He is currently representing the United Arab Emirates in a number of proceedings before the International Court of Justice.  Likewise, he is representing the Democratic Republic of the Congo in the case concerning Armed Activities on the Territory of the Congo (Democratic Republic of the Congo v. Uganda).

His non-contentious experience includes advising private entities on investment treaty law and on multiple other public international law areas.  He also has advised States and international organisations on international trade law and on human rights, international humanitarian law and international criminal law issues.

Equally, he has taught law of the sea, international environmental law and law on immunities at King’s College and SOAS University and delivered practical training in public international law and international investment law to public officials of multiple States.  He has published a book chapter on sovereign immunities and arbitration awards and numerous articles on issues such as investment treaty arbitration, law of the sea, international dispute resolution and business and human rights.


English; Spanish; French


London Court of International Arbitration (LCIA); Spanish Club of Arbitration (Club Español de Arbitraje)



Member of the Madrid Bar Association (Spain) (2006)

Solicitor of the Senior Courts of England and Wales (2019)


International Committee of the Red Cross – Annual Course on International Humanitarian Law (2014)

University of Leiden – Master of Advanced Studies in Public International Law (2011)

Universidad Autónoma de Madrid – LL.B (2006)

Universidad Autónoma de Madrid – B.A (Political Sciences) (2006)

Lawyer Rankings

London > Dispute resolution > International arbitration

Volterra Fietta is a specialist public international law practice that is particularly experienced in representing investors and governments in investment treaty arbitrations; the firm also has a significant international commercial arbitration practice that spans the globe and includes all the major arbitration centres and rules. The principal advisers are Robert VolterraGraham Coop and recently promoted counsel Álvaro NistalGiorgio Mandelli and Suzanne Spears left for King & Spalding LLP and Allen & Overy LLP, respectively.

London > Dispute resolution > Public international law

(Next Generation Partners)

Álvaro NistalVolterra Fietta

Volterra Fietta is a boutique practice focusing entirely on public international law. The team has ‘a very good reputation‘ as counsel and advocates at the International Court of Justice, the European Court of Human Rights and tribunals constituted under the auspices of the Permanent Court of Arbitration, ICSID and United Nations Convention for the Law of the Sea. The practice advises a mix of states, international organisations and corporate clients on bilateral investment treaties; land and maritime territorial and boundary disputes; treaty interpretation; state responsibility; sovereign and diplomatic privilege and immunity; economic sanctions; international environmental law; and international trade and WTO law. Key figures include name partner Robert Volterra, Graham Coop and international counsel Álvaro Nistal.