CMS maintains a large data protection team comprised of ‘exceptional’ individuals who possess a ’mastery of the subject matter’. The firm is a leading adviser to major international clients across technology, fintech, energy, and financial services, specialising in complex matters. The group's expertise encompasses the entire compliance lifecycle for generative AI, DORA, e-Privacy, and data transfers, as well as high-value work in cybersecurity, HR data processing, and TMT-related M&A. The team is led by Dóra Petrányi, who focuses on cybersecurity, data protection, and GDPR matters. CEE data protection co-ordinator Márton Domokos and Katalin Horváth, an expert in fintech and AI law, add depth, and are complemented by Péter Homoki, who shines for his ‘deep IT expertise’. The team is further supported by Anna Zsófia Horváth, who develops guidelines to enable the effective application of EU data protection and IT policies.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
- Marton Domokos is a tireless senior who has an honest interest in technology, data protection, and recently all AI developments. He also does an excellent job of managing juniors and bringing in new talent. Janos Balint is persistently performing at the highest level with high attention to detail, challenging decisions if needed. He is highly appreciated; even if the tasks are monotonous, he is always ready to tackle the challenges.
- They have an easygoing but very focused attitude and attention to detail.
- ‘I had the pleasure of working with Márton Domokos and attending several workshops held by Márton and Katalin Horváth. Márton truly sets himself apart as a professional; he is a genuine business partner who provides calm, instantaneous, and supportive counsel even in the most complex situations. His profound knowledge (and interest) of the company and focus on risk management make his legal advice uniquely valuable and a testament to his expertise.'
- ‘The professionals I had the privilege of working with possess a truly exceptional combination of qualities. Their unwavering dedication to their field ensures they maintain a profound level of expertise, which they share by providing excellent workshops for their peers. What truly sets them apart, however, is a quality that goes far beyond professional courtesy: a deep and insatiable curiosity for global initiatives and innovations.'
- ‘Péter Homoki's professional knowledge is impressive. The fact that he not only has legal knowledge but also deep IT expertise has greatly helped during the collaboration.’
- ‘Márton Domokos is great, effective, kind, and explains matters without complex legal jargon.’
Key clients
- Microsoft
- Baumit
- BP
- Raiffeisen
- Kyndryl Holdings, Inc
- Samsung Electronics
- RTL Group
- Magyar Telekom Plc
- IT Services Hungary
- SimplePay Plc
- HelloPay Plc
- MOL
Work highlights
Advised Samsung Electronics on day-to-day data protection matters, regulatory issues, contracting procedures, and the local feasibility of global features.
Acted for Microsoft in a wide array of data protection matters and their strategic projects for over a decade.
Represented OTP Group (SimplePay, HelloPay, OTP Bank) in a wide array of data protection matters and in data breach management.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Dóra Petrányi
Other key lawyers
Katalin Horváth; Márton Domokos; Péter Homoki; Anna Zsófia Horváth