"Ondrej Hajda is an excellent associate."
Legal 500 2024


Ondrej Hajda (he/him) is an associate in the Intellectual Property Group and a member of the Technology & IP Transactions and Cybersecurity & Data Privacy practices of Mayer Brown’s London office. He joined Mayer Brown as a trainee in 2018 and spent six months on a secondment to the legal team of a global insurance broker. Ondrej is a Certified Information Privacy Professional – Europe (CIPP/E).

Ondrej advises on a variety of intellectual property, technology and data protection matters. His experience includes assisting clients with:

  • licensing and monetisation of intellectual property and data,
  • global technology outsourcing transactions,
  • regulatory requirements of online platform operators,
  • GDPR and e-marketing compliance projects,
  • cross-border data transfers and transfer impact assessments, and
  • multijurisdictional cybersecurity incident response.

He has a particular interest in artificial intelligence and the environmental, social and governance (ESG) implications of new technologies.

Ondrej maintains an active pro bono practice and advises charities and NGOs on a range of intellectual property, technology and data protection matters.

Spoken Languages

  • Czech
  • English
  • Spanish


University of Oxford, PGDip in Intellectual Property Law and Practice

BPP University Law School, LPC and GDL

University of St Andrews, MA (Hons) International Relations


  • England and Wales


  • Member, Society for Computers and Law (SCL)
  • Member, International Association of Privacy Professionals (IAPP)
  • Listed as a key lawyer for TMT, 'Ondrej Hajda is an excellent associate.'  Legal 500.