Dr. Alexandra N. Diehl

Local Partner, Frankfurt



Alexandra Diehl focuses on national and international dispute resolution with a special focus on arbitration (DIS, ICC, ICSID, SCC and ad hoc). She represents German and multinational clients in all phases of disputes and has started to develop an active arbitrator practice.

At ease with the multijurisdictional intricacies of transnational fact patterns, Alexandra supports clients with complex disputes relating to Post M&A, international investment law, IP and liability issues (including lawyer and managing directors' liability). She also regularly advises clients on issues relating to private international law and cross-border taking of evidence. Moreover, she gives IP-related advice in technology-driven transactions and with regard to R&D and license agreements.

Prior to joining the firm, Alexandra worked for eight years for a major British law firm in Düsseldorf and Frankfurt.

Alexandra regularly publishes on international arbitration matters and teaches international investment law at Heinrich-Heine-University of Düsseldorf.

Bars and Courts
Attorney-at-Law, New York
Dr jur
University of Würzburg
Second State Exam
Higher Regional Court of Düsseldorf
Global Technology
Suffolk University Law School


First State Exam (JD)
University of Münster


Representing a German consumer goods manufacturer in an ICC arbitration subject to Saudi Arabian law seated in Paris.*

Representing a German telecommunications company in a DIS arbitration based on a data delivery contract against a Belgian supplier.*

Representing an English investor in an UNCITRAL arbitration against Poland.*

Representing a US automotive supplier in a DIS Post M&A arbitration and set aside procedure before German courts.*

Counsel of a power plant operator in a series of 17 arbitrations concerning defects and delay and disruption claims originating in the construction of an 850 million EUR pulp-mill project in Sachsen-Anhalt (Germany).*

Defending former managing directors of multinational chemical company against three digit damage claims raised by insolvency administrator.*

Defending German leading law firm in negligence suit filed by former prime minister of German state of Baden-Wuerttemberg.*

IP-advice in various technology-driven transactions, e.g. Acino on sale of transdermal patch and implant businesses.*

*Matters prior to working for White & Case

Speaking Engagements

"Collective Litigation in Germany, the EU and the U.S.: Model Declaratory Proceedings under Scrutiny: Class action light?", 24 Oct: Client Seminar – White & Case Office – Frankfurt, Germany


The Core Standard of International Investment Protection: Fair and Equitable Treatment, International Arbitration Law Library, Kluwer Law International, 2012

IP Arbitration, Milbradt (Ed.), Patent Litigation in Germany, GLP, 2012

The Challenge of Developing Common Mediation Law Regimes in Europe and the United States: From "Patchwork" to Coherence?, World Arbitration & Mediation Review, Vol. 3 No. 1, 2009, (co-author with Siegfried H. Elsing)

Tracing a Success Story or "The Baby Boom of BITs", Reinisch/Knahr (Ed.), International Investment Law in Context, Eleven, 2008

Awards and Recognition

Arbitration Future Leaders – Partners 2020
Who's Who Legal

Nominated for Who's Who Legal Arbitration Future Leader 2017 and 2018