Jones Day manages data protection and cybersecurity mandates across Germany and Europe, advising clients on EU’s digital strategy legislation, such as Data Act, AI Act, and NIS2 Directive, handling data breaches, and representing them in significant proceedings before data protection authorities. Practice head Undine von Diemar supports clients across all industry sectors on critical data protection matters, including incident responses, internal investigations, international data transfers, and global compliance projects. She is supported by Martin Lotz, who leverages his expertise in criminal law to manage cross-border compliance investigations and cybercrime cases.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘What makes this practice truly unique is the exceptional combination of deep legal expertise, forward-thinking innovation, and an unwavering commitment to client success. The team is composed of highly accomplished professionals whose cross-disciplinary knowledge and collaborative mindset enable them to deliver tailored, strategic solutions even in the most complex legal landscapes.'
- ‘What truly sets the individuals at this firm apart is their extraordinary dedication and the consistently high standard of their work. From partners to associates, every team member operates with a rare blend of deep legal insight, strategic thinking, and genuine client care that goes far beyond the norm. They don’t just deliver legal advice, they become trusted advisors and proactive problem solvers.'
- ‘Jones Day combines astute legal advice with a practical and pragmatic approach. They know not only the law but also the key players in government and the market.’
- 'They take the time to understand our business objectives.’
- 'What I value most is the consistency of excellence across the team: every interaction is marked by preparation, insight, and a collaborative spirit. This group not only brings superior legal capabilities but does so with a work ethic and client-first mindset that’s second to none. Their combination of legal acumen and true partnership is what makes working with them not just effective, but a genuine pleasure.'
Key clients
- BlackBerry
- Carly Solutions GmbH & Co KG
- Internet Corporation of Names and Numbers|(ICANN)
- SAP SE
- WiseTech Global
- BayWa AG
- Biolinq, Inc.
- Mastodon gGmbH
- Micron Technologies Inc.
- Recorded Future
Work highlights
Advising BlackBerry on European data protection laws and new EU laws on data and cyber security.
Advising ICANN in Europe and worldwide on an ongoing basis on various data protection requirements relevant to ICANN.
Advising SAP on data protection law and new EU data laws.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Practice head
Undine von Diemar
Other key lawyers
Martin Lotz