Geoffroy Lyonnet

Partner, Paris Managing Partner

Lyonnet, Geoffroy

Rankings

Chambers Global 2020 - France: International Arbitration

Geoffroy Lyonnet impresses sources with his "attention to detail and advocacy skills." He frequently act for sovereign states facing private investors in investment arbitrations.

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.’

"really outstanding, effective and impressive." ...a favourite with clients: "He's personable, likeable and comes across as someone who talks good sense."

Chambers Global 2015