Representative work includes advising multinational clients on:
- the development, implementation and operation of several national IT infrastructure projects;
- all aspects of data protection and privacy, dealing with large scale data and security breaches and cybersecurity;
- corporate data protection/privacy related projects including advising on various matters involving the Office of the Data Protection Commissioner, audits, PIAs, preparation for GDPR, group implementation of policies and review of existing policies & procedures; and
- negotiation of complex commercial contracts including outsourcing and naming rights agreements.
2025 Chambers Europe
"David is excellent on the subject matter, calm, engaging and reassuring to the client." "David Cullen sets the bar for pragmatic, tailored and client-focused advice."

2023 Legal 500 EMEA
David is ranked in the Hall of Fame for Information Technology for Legal 500.
