Marie L'Helias

Katharina Berbett is a top attorney recognized by Best Lawyers in the practice area(s) of Information Technology Law. Katharina, who practices law in Paris, France, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Katharina is held by other top lawyers in the same geographic and legal practice area.

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Thierry Lauriol is a recognised specialist in the fields of mining, energy and natural resources law, and in international, commercial and investment arbitration, and OHADA law. As Partner since 1997 and Manager of the Energy, Mining and Infrastructure Department, he has almost thirty years’ experience in France, Europe, Africa and the Middle East. Thierry, who has a Doctorate in Law, teaches at Paris II – Panthéon-Assas University, where he co-leads a university diploma de...

Sabine Naugès is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative Law, Public Law and Regulatory Practice. Sabine, who practices law in Paris, France, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sabine is held by other top lawyers in the same geographic and legal practice area.

Pierre-Jacques Castanet is the managing partner of In Extenso Avocats Ile de France, a firm that provides advice in the fields of labor and employment and tax law. He runs the firm’s labor and employment law department with his partner, Stanislas Dublineau. He specialises in employment and social welfare law. Before joining In Extenso Avocats, Pierre-Jacques was a partner at IDAvocats and Idrac & Associés. With more than 30 years’ experience at the Paris Bar, Pierre-Jac...

Alexandra Massaux is a top attorney recognized by Best Lawyers in the practice area(s) of Information Technology Law. Alexandra, who practices law in Paris, France, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Alexandra is held by other top lawyers in the same geographic and legal practice area.

Philippe Hansen has been a partner since 2011. He’s specialized in urban planning, development law and became one of the most reknown experts in public property law. He also works regularly in the railway sector regulation and in art law, working both for public institutions and museums and for private collectors. He’s the author of a textbook on public property law (Propriété des personnes publiques en 100 questions, Le Moniteur, 2012). He also participates in sever...

Matthieu Bichon, member of the Paris Bar since 2006, practices essentially in mergers & acquisitions, corporate law and securities law. He assists French and foreign clients, principally, in acquisitions and divestitures of shares or strategic assets transactions, private equity deals, joint ventures and capital operations as well for the structuring of their management packages. He also advises in M&A litigations. Over the recent years Matthieu has been involved in many transactions ...

Emeline Peltier is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law. Emeline, who practices law in Paris, France, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Emeline is held by other top lawyers in the same geographic and legal practice area.

François Braud is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative Law, Environmental Law and Public Law. François, who practices law in Paris, France, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which François is held by other top lawyers in the same geographic and legal practice area.