Geoffroy Lyonnet

Partner, Managing Partner, Paris

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Lyonnet Geoffroy

Rankings

Legal 500: EMEA 2024 - Dispute Resolution: International Arbitration - France

Hall of Fame

‘Geoffroy Lyonnet is the team’s strategist.’

Legal 500: EMEA 2024 - Dispute Resolution - Kazakhstan

Recommended

Legal 500: EMEA 2023 - Dispute Resolution: International Arbitration - France

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."

Legal 500: EMEA 2023 - Dispute Resolution - Kazakhstan

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.

Chambers Global 2023 - Kazakhstan - Dispute Resolution

Expertise based abroad in France.

Chambers Global 2022 - Dispute Resolution - Kazakhstan - Expertise Based Abroad in Kazakhstan

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.

Chambers Global 2021 Dispute Resolution - Kazakhstan

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."

Chambers Europe 2019 - Dispute Resolution: International Arbitration - France

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."

Leaders League 2018-19 France - Best Law Firms

Known for his advocacy, Geoffroy Lyonnet serves as both lead counsel and arbitrator and was instrumental in the Kazakhstan Oil Field case.

Chambers Europe 2018 - Dispute Resolution: International Arbitration - France

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.

Chambers Europe 2017 - France: Dispute Resolution

Sources say: "He has shown outstanding profundity in the analytical work done."

Legal 500: France 2016

Geoffroy Lyonnet est également très expérimenté.

Chambers Global 2015 - France: Dispute Resolution

"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."

Legal 500 EMEA 2014 - Paris: International Arbitration

Geoffroy Lyonnet is ‘on top of all relevant details.’

"Geoffroy Lyonnet is an excellent and very experienced professional who leads the team with talent."

Legal 500: EMEA 2023