Band 2
Provided by Marie-Hélène Tonnellier
Marie-Hélène is one of the leading lawyers in the digital world. She advises and litigates on all issues related to IT projects, innovations (AI, robots, etc.), e-commerce and personal data. She also intervenes in media law and intellectual property.
Highly skilled in the sectors of distribution, tourism, luxury, new economy, mobility, media or services, she assists her clients in the implementation of strategic projects or in their digital transformation, helps them navigate through the various new rules in these various fields, assists them in often complex and innovative litigations.
Member of the Paris Bar since 1990, Marie-Hélène co-founded Oyat in 2022.
Marie-Hélène began her career in London within a solicitors’ firm prior to joining Moquet Borde & Associés (Paul Hastings) in 1990, then Jeantet in 1995. Then she has been a partner for 22 years at Latournerie Wolfrom Avocats where she created the digital and intellectual property department.
International Federation of Computer Law Associations (IFCLA)
Association Française de Droit de l'Informatique et de la Télécommunication (AFDIT)
International Bar Association (IBA)
ACTIVITIES
Lecturer at the University Paris XI-Saclay, Master Intellectual Property and Digital Law
Lecturer at the HEAD school, Master Digital and Intellectual Property Law
Former President of the IFCLA
Member of the Board of Directors of AFDIT
Member of the International Bar Association (IBA)
English
French
Lawyer of the Year
Best Lawyers
2024
Provided by Chambers
Marie-Hélène Tonnellier of OYAT moves up the rankings this year on the basis of increased market recognition. She advises on a wide range of IT matters, including software agreements, development and integration agreements, and licensing issues. Her clients range from market-leading domestic companies to international brands.
Provided by Chambers
"Marie-Hélène gives straightforward answers, and she is a very charming person who is pleasant to work with."
"I appreciated what she brought to the negotiations: she had gravitas when we needed authority and humour when we needed to relax and loosen up."
"Marie-Hélène perfectly understands our approach and knows where she provides most added value to intervene."
"Marie-Hélène gives straightforward answers, and she is a very charming person who is pleasant to work with."
"I appreciated what she brought to the negotiations: she had gravitas when we needed authority and humour when we needed to relax and loosen up."
"Marie-Hélène perfectly understands our approach and knows where she provides most added value to intervene."
