Guillaume Chaineau

Pierre Frühling is a top attorney recognized by Best Lawyers in the practice area(s) of Aviation Law and Transportation Law. Pierre, who practices law in Paris, France, has been recognized since 2017. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Pierre is held by other top lawyers in the same geographic and legal practice area.

Michel Sapin is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Governance and Compliance Practice. Michel, 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 Michel is held by other top lawyers in the same geographic and legal practice area.

Rémi Lorrain is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Governance and Compliance Practice and Criminal Defense. Rémi, 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 Rémi is held by other top lawyers in the same geographic and legal practice area.

Franck Morel advises companies on employment law, with a particular focus on working time regulations, collective bargaining, employee representation, and managing organizational change, all areas in which he has developed recognized expertise, both in legal advice and litigation. He also has in-depth knowledge of non-standard forms of employment (such as temporary work, umbrella companies, and freelance platforms), religious matters in the workplace, and professional training. He supports a ...

Julien Horn focuses on information technology and intellectual property litigation. He also handles transactional and contractual work on IP and IT assets. Julien Horn’s litigation practice is prominent in the field of software litigation, patent litigation, and trademark litigation. He has also acquired significant expertise in the planning and monitoring of innovative mass litigation campaigns for IT and software companies. He regularly publishes articles on IP and IT issues in the le...

Hélène Gelas advises on public law, environmental law, urban planning law and energy law, in the field of energy and real estate. She holds a doctorate in law and assists her clients, from large listed groups and investment funds to small and medium-sized French and international companies, with advice and litigation before the administrative courts and in all stages of projects, whether for major real estate development projects or for renewable energy projects (wind, photovolt...

2.1 Pull-out Statement/ Quote Antitrust and Regulatory lawyer Jean-Paul Tran Thiet brings experience and know-how to clients involved in competition-related proceedings or facing regulatory stakes. He is described as “ ‘An iron hand in a velvet glove’ when it comes to defending his clients’ interests ”. (Legal 500, EU Competition and Distribution (France) 2014) 2.2 Biographical overview As head of the EU Antitrust and Regulatory Practice at SophiaLex, Jean-Paul T...

Marie-Muriel Barthelet is a top attorney recognized by Best Lawyers in the practice area(s) of Private Equity Law. Marie-Muriel, 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 Marie-Muriel is held by other top lawyers in the same geographic and legal practice area.

Marie-Hélène Tonnellier is a top attorney recognized by Best Lawyers in the practice area(s) of Advertising Law, Information Technology Law, Intellectual Property Law, Media Law, Privacy and Data Security Law and Technology Law. Marie-Hélène, 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 Marie-Hélène is held by other top lawyers in the same geographic and legal practice area.

Frédéric Forster is a top attorney recognized by Best Lawyers in the practice area(s) of Technology Law and Telecommunications Law. Frédéric, 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 Frédéric is held by other top lawyers in the same geographic and legal practice area.