Best Lawyers in France for Privacy and Data Security Law
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With more than 15 years of experience appearing before U.S., E.U., and French regulators, Sara has consistently guided clients through the intricacies of domestic and cross-border regulatory matters. Her practice encompasses advisory services, implementation, investigations, and disputes—most notably in the financial services and banking, health care, technology and new media, and telecommunications sectors.
Sarah Lenoir is a top attorney recognized by Best Lawyers in the practice area(s) of Intellectual Property Law and Privacy and Data Security Law. Sarah, who practices law in Paris, France, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sarah 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.
Professional activity · Attorney-at-law, Member of the Paris Bar (2005); Head of the Advertising & E-Marketing department of the Alain Bensoussan Avocats Lexing law firm. 2. Practice areas · Advertising and Marketing law; · E-commerce law; · Consumer law; · Data protection law. 3. Experience 1. Céline Avignon is the Head of the Advertising & E-Marketing department. Her practice focuses in: · Viral marketing; · Games and contests;...
French qualified lawyer specialised in Information Technology, Data Privacy and Intellectual Property. Fluent in English. Her career as a specialist intellectual property and information technology lawyer began in Paris in 2001, in a major international law firm. From there, she was subsequently posted to Shanghai, in the People's Republic of China, for 4 years.After this enriching international experience, she spent several years as a Partner in a French law firm specializing in IT, media an...
A specialist in digital law, Éric Le Quellenec has led several large-scale GDPR compliance and digital transformation programs for major French and international corporations. He advises both software providers and end-users on AI projects, combining risk management with accountability in usage—most tools used in the HR field being classified as high-risk under current regulations. For large-scale projects such as HRIS or talent and career management systems, he has taken on role...
Mathilde Croze is a top attorney recognized by Best Lawyers in the practice area(s) of Information Technology Law, Privacy and Data Security Law and Technology Law. Mathilde, 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 Mathilde is held by other top lawyers in the same geographic and legal practice area.
Cécile Théard-Jallu has developed in-depth expertise as an attorney in private practice representing multinational corporations, including major US and European firms and organizations in the R&D and healthcare sector (public or private research institutions, academics, pharmaceutical laboratories, biotechnology companies, medical equipment manufacturers, service providers, software or connected health platforms publichers, investors, competitiveness clusters, tech transfer ...
Our Methodology
Recognition by Best Lawyers is based entirely on peer review. Our methodology is designed to capture, as accurately as possible, the consensus opinion of leading lawyers about the professional abilities of their colleagues within the same geographical area and legal practice area.
The Process
Best Lawyers employs a sophisticated, conscientious, rational, and transparent survey process designed to elicit meaningful and substantive evaluations of the quality of legal services. Our belief has always been that the quality of a peer review survey is directly related to the quality of the voters.