Lawyers
Member of the Paris Bar since 1999, Laurent de La Brosse co-founded Oyat in 2022. Laurent has previously been a partner at Latournerie Wolfrom Avocats within the public business law department since 2007. Laurent’s practice focuses on public economic law, public contracts (complex arrangements), particularly in the mobility and energy sectors, public real estate (development operations), environmental law and classified facilities. He advises both public and private clients, in both advisory and litigation matters (including judicial mediation, conciliation and settlement).
Marie-Hélène Tonnellier is the head of the Digital/IP department and advises on IT projects, in particular those related to the digital transformation strategy of companies, in the context of technological litigation, on issues related to new technologies (artificial intelligence, drones, robots, blockchain, etc.) and to personal and/or public data, as well as in the context of e-commerce projects. She teaches in the Master 2 Digital Law program at the University of Paris-Saclay. Marie-Hélène worked as a partner at Latournerie Wolfrom for 23 years, after having worked for one year in London and 9 years at Moquet Borde et Jeantet.
