Mobility is at the heart of the various areas of expertise developed by our firm. As such, we are a privileged partner of the major stakeholders in sustainable mobility.
Oyat has built a dedicated team with a wide range of skills, mainly in public law, data law and digital law, to cover all aspects of setting up mobility projects.
Our team regularly assists its clients in conducting procedures for the award and performance of public transport contracts (operation of transport links or management of transport infrastructures) on large-scale operations, particularly in the following areas: rail, road, air, space, river and maritime.
We also intervene in all litigation aspects relating to the award and performance of these contracts before both French and European courts (European Commission, CFI and CJEU). Our team also advises on the opening up of economic sectors to competition, particularly in the rail sector.
Well experienced in the law governing data, public and/or personal, and in the law governing the digital platforms through which mobility tickets are often distributed, our Digital Team lawyers bring their specific expertise to bear on these strategic issues for the development of these projects.
With a thorough understanding of the regulations applicable to these specific contracts, and a thorough knowledge of the players, practices and regulatory authorities in this market, the Oyat team is a real asset for successfully managing mobility services projects.
By pooling the expertise and the collaborative method of our teams, we have structured for the benefit of our clients cross-functional offers that cope with the current and future challenges in the field of mobility.
Expertise in all property, town planning, and environmental procedures related to the performance of large transport infrastructure projects.
Support and legal framework of the contract award procedures related to mobility services and/or infrastructure construction
Assessment of the compatibility of support and economic development measures in the field of sustainable mobility, particularly with regard to applicable State aid regulations
Legal representation, including before regulatory authorities and European institutions.
“The team is noted for its pragmatism and offers innovative solutions and ideas.” – Chambers
“Exceptionally smooth collaboration, meticulous follow-up, and sound advice on complex and long-term cases. Expertise in the substance of the matter was never found wanting.” – Legal 500
Chambers 2026
Legal 500 EMEA 2026
“Exceptionally smooth collaboration, meticulous follow-up, and sound advice on complex and long-term cases. Expertise in the substance of the matter was never found wanting.”
“Laurent de la Brosse: very easy to contact, impeccable rigour, strong interpersonal and political skills, great discretion.”
“They demonstrate excellent listening skills and a deep understanding of the challenges involved in concession contracts, with a strong ability to engage effectively with public stakeholders. The firm has become more agile and responsive.”
“A highly coordinated and united team capable of ensuring the transmission and continuity of files over long periods.”
“Laurent de la Brosse: excellent availability and accessibility. ”
“Excellent expertise in public law. Strongly positions himself as a business partner, focusing on understanding the client’s real-world issues.”
“A dynamic team of digital law experts who demonstrate a very high level of responsiveness.”
“Potential clients should know that OYAT excels in providing tailored solutions for businesses navigating the digital landscape. Their ability to bridge the gap between legal frameworks and technological advancements makes them a trusted partner for innovation-driven organizations.”
“OYAT’s IT and internet practice is highly regarded for its deep expertise in handling complex legal issues. The team’s ability to address matters such as IT contracts, data protection, and emerging technologies like AI ensures that clients receive cutting-edge and commercially sound advice.”
“Marie-Hélène Tonnellier stands out as France’s premier authority in TMT law, and she’s my go-to expert for all things technology, intellectual property, and data privacy. Her presence dominates top tech law conferences, her thought leadership shapes the field, and her blend of professionalism and approachability makes her truly a one-off.”
“Marie-Hélène Tonnellier and her colleague Camille Guyot are skilled at providing concise and comprehensive legal analyses and finding the right arguments to defend their clients. Furthermore, they also know how to proactively offer solutions to their clients.”
“The team stands out for its technical mastery of contractual issues related to intellectual property, liability, and cybersecurity, while remaining pragmatic and solution-oriented.”
Décideurs / Leaders League 2026
Public Law
Innovation, technology & telecoms :
Le Point 2026
Best Lawyers 2027
Best Law Firms 2027
