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Managing Partner, Paris
P +33 1 42 68 72 00
F +33 1 42 66 39 62
Hall of Fame recipient.
Geoffroy Lyonnet is best known for his work on investor-state disputes. Clients describe him as an, "exceptional practitioner. Very smart and well respected by the client and the counterparty."
Geoffroy Lyonnet is based in Paris and regularly handles Kazakhstan-related international arbitration, particularly in the oil and gas sector. He advises government agencies and state-owned enterprises on a broad range of contentious and non-contentious matters.
Expertise based abroad in France.
Geoffroy Lyonnet is based in Paris and regularly handles Kazakhstan-related international arbitration, particularly in the oil and gas sector. He is well placed to advise government entities.
Geoffroy Lyonnet is based in Paris and regularly handles Kazakhstan-related international arbitration, particularly in the oil and gas sector. One source declares that "he is remarkable - I have never seen a cross-examination as successful as his."
Geoffroy Lyonnet is best known for his work on investor-state disputes. He also acts on ICC rules commercial arbitrations and co-ordinates subsequent enforcement actions with local counsel. Interviewees say that he is "thoughtful and knowledgeable."
Known for his advocacy, Geoffroy Lyonnet serves as both lead counsel and arbitrator and was instrumental in the Kazakhstan Oil Field case.
Geoffroy Lyonnet is recognised in the market for his strong cross-examination skills. He is experienced handling investor-state arbitrations and commercial arbitrations, with notable activity in oil and gas sector disputes.
Sources say: "He has shown outstanding profundity in the analytical work done."
Geoffroy Lyonnet est également très expérimenté.
"really outstanding, effective and impressive." His practice focuses on commercial and investment arbitrations, and he is a favourite with clients: "He's personable, likeable and comes across as someone who talks good sense."
Geoffroy Lyonnet is ‘on top of all relevant details.’
Commercial Disputes - Arbitration
Mergers and Acquisitions
Energy (Oil & Gas)
News 16 Feb. 2024
Curtis Has Been Recognized in the Latest Chambers Global 2024 Guide
News 14 Apr. 2023
Curtis Secures 11 Practice Area and 25 Attorney Rankings in Legal 500: EMEA 2023
Legal 500: EMEA 2023