Balancing Ambition and Reality: Will the ICC's Revised Arbitration Rules Match Their Promise?
12 minute read | May.26.2026
Leon Diederichs, LL.M. (QMUL)
Associate
デュッセルドルフ
Leon Diederichs advises and represents clients in complex national and international arbitration proceedings and before German courts.
Leon is a trilingual disputes lawyer educated in Germany and England. He handles complex and high-value commercial disputes, antitrust damages claims and post-M&A disputes in the German courts and under the major arbitration rules including the ICC, DIS, and VIAC. He is also experienced in various aspects of antitrust law (e.g., merger control, market dominance cases, investigations, etc.).
Predominantly Leon's work includes cross-border disputes including between parties from, inter alia, the U.S., France, the Netherlands, Italy, Mexico, Switzerland and Germany.
Leon advises and represents clients in the technology, infrastructure, and energy sectors, delivering strategic solutions to complex legal and regulatory challenges in Germany and internationally.
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- Representing a leading U.S. petrochemical corporation in German antitrust follow-on damages claims before two German courts.
- Representing a Chinese manufacturer of wireless technology for industrial IoT applications in a high-stake German litigation with a value of 18.5 Million Euros.
- Advising a global Tier 2 automotive supplier in international commercial disputes relating to the sale of goods to customers in Germany, Switzerland, Italy, the U.S. and Mexico.
- Part of the team that represented Aeonmed in first successful action against ministerial prohibition to acquire Heyer in the German history of Foreign Direct Investment law (see: https://www.orrick.com/en/News/2023/11/Orrick-represents-AEONMED-in-successful-action-against-ministerial-prohibition-to-acquire-Heyer).
- Advising and representing a German technology SME in a dispute over unfair employee poaching and competitive practices.
- Advising a German machine manufacturer in various international (e.g., with Italian and Indonesian customers) and German commercial disputes relating to the sale of machinery.
- Advising a Chinese electronics manufacturer on multi-stakeholder insurance claims after a warehouse fire.
- Representing a private client and his foundation in multi-court litigation in Germany, involving large real estate portfolios.
