Both commercial arbitration and investor-state cases continue to regularly engage the practitioners in Clifford Chance‘s disputes team, which acts for a mix of international companies, as well as several countries. The German offices have become a core hub for arbitration proceedings within the firm’s European network. Michael Kremer leads the dispute resolution practice and is well versed in arbitration under various international rules. Moritz Keller is the lead contact for international arbitration, while Jan Conrady is a contact to note for matters relating to plant construction and infrastructure. Paul Hauser’s broad practice includes expertise in post-M&A arbitrations, and Stefan Lohn and Sarah Lemoine are the names to note below partner level. Alexandra Diehl, whose practice focuses on the representation of states in investment arbitration proceedings, joined the group from White & Case LLP in October 2025.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘This team is truly a partner of the business or client. They are collaborative, swift and available to react quickly, and highly professional.’
- ‘I would highlight their experience and professional skills. Also, they are client-oriented: they find and propose the legal solutions adapted to the business objectives to ensure the continuity of the business or projects. They are swift and available to support in all urgent situations. Finally, they adapt the way of working to the needs of the client, which is also highly appreciated.’
- ‘Our collaboration with Clifford Chance has been outstanding. Their client-centric focus is evident through their exceptional responsiveness and willingness to accommodate urgent needs, including on-site meetings. Beyond their strong legal acumen, they demonstrate remarkable proficiency in overall case strategizing and preparation, consistently offering proactive and pragmatic solutions.’
- 'Moritz Keller is well known for his deep expertise in arbitration proceedings. His insights extend beyond procedural matters, offering valuable strategic advice, risk assessments, and a range of well-considered options. His established reputation and connections in the field clearly contribute to the confidence we place in his guidance. Paul Hauser consistently shows a strong grasp of our needs, always providing valuable advice and insights that consider aspects beyond the purely legal. His ability to understand our broader context is a significant asset.'
- 'The whole team clearly possesses extensive experience in arbitration, which is evident in their practical and strategic contributions, including the associates and support staff for research and analytics. Their thoroughness and dedication have impressed us and are greatly appreciated.'
- ‘The Clifford Chance team is always quick to respond with comprehensive feedback. All lawyers in the Clifford Chance team demonstrate expertise in the sector and are able to draw market knowledge from their work in other jurisdictions. What is most remarkable is Clifford Chance's awareness of how to handle commercially and procedurally delicate situations in a client-attractive and solution-oriented way.’
- ‘Moritz Keller provided exceptional guidance. Highly responsive and strategic, he combined deep technical expertise with practical solutions, ensuring efficient coordination and clear advocacy throughout. We strongly recommend him and Clifford Chance Frankfurt for high-stakes investor-state arbitrations.’
- 'Moritz Keller’s guidance was instrumental throughout the proceedings, demonstrating advanced knowledge of international arbitration frameworks.'
Key clients
- Auomotive OEM
- Eckes-Granini
- Republic of Slovenia
- Republic of Albania
- Republic of Croatia
- Republic of Serbia
Work highlights
Represented an international pharmaceutical company in two arbitration proceedings under the Swiss Rules in connection with the planning and construction of a €700m pharmaceutical production plant in Germany.
Represented western European gas customers in major disputes with Gazprom Group over denied gas supplies, enforcing claims through ICC arbitration.
Represented the Republic of Croatia in an ICSID arbitration brought by a state-owned energy company under the Energy Charter Treaty in connection with a dispute over gas pricing measures.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Alexandra Diehl
Practice head
Michael Kremer
Other key lawyers
Moritz Keller; Jan Conrady; Paul Hauser; Alexandra Diehl; Stefan Lohn; Sarah Lemoine