Mr Mark Prinsley > Mayer Brown International LLP > London, England > Lawyer Profile

Mayer Brown International LLP
Mark Prinsley photo

Work Department

Intellectual Property


Mark Prinsley concentrates on non contentious intellectual property including, in particular, IT project and outsourcing work. Mark is head of the Intellectual Property & IT group in London as well as the outsourcing practice. His practice involves acting for customers at all stages of outsourcing transactions. Recent outsourcing projects have included acting for a commodity exchange in the outsourcing of its IT functions; a telecommunications company in IT outsourcing; a global bank in the outsourcing of its human resources functions; a global chemicals company in outsourcing its Finance and Accounting functions; a global automotive company in the outsourcing of human resources functions; and a consumer goods company in Finance and Accounting outsourcing. Mark also works on the technology aspects of corporate transactions and advises online gambling businesses including, in particular, in relation to international activities of UK operators.


University of Oxford, Brasenose College 1978 Law Degree

Lawyer Rankings

London > Industry focus > TMT

Mayer Brown International LLP‘s ‘extremely responsive and tech savvy’ team has a particularly strong track record in the media and entertainment industry, where it advises clients in relation to major acquisitions, complex disputes and various other matters. In a recent case, the team successfully defended eOne in fraud proceedings, resulting in a favourable settlement. The ‘outstanding’ Miles Robinson specialises in commercial litigation, Robert Hamill leads the firm’s work in the media sector, and Mark Prinsley specialises in cybersecurity and data privacy law. Senior associate Harriet Hainsworth handles numerous corporate transactions in the technology sector, including M&A.

London > TMT (technology, media and telecoms) > IT and telecoms

Mayer Brown International LLP is particularly well-known for advising clients in the financial services industry on the application of cutting-edge technology, cloud arrangements and data issues. It is also highly regarded for its fintech and insurtech work, with an emphasis on AI-based projects. Mark Prinsley leads the firm’s IP and IT group; Andrew Stewart focuses on commercial arrangements in the technology sector; Richard Page advises TMT companies on corporate transactions, including M&A and private equity investments. Oliver Yaros is also a core member of the team, with a wealth of experience assisting clients in the financial services industry with utility projects, technology outsourcing and IT systems procurement.

London > TMT (technology, media and telecoms) > Fintech

Mayer Brown International LLP advises a range of clients, including start-ups, global financial institutions and tech companies. Its broad expertise includes fintech-related IP matters, cloud-related outsourcing agreements, cryptocurrency and blockchain projects. On the emerging technology side, the practice handles transactional work, disputes and regulatory matters. Mark Prinsley leads the IP and IT group and also the outsourcing practice; he has considerable experience of conducting outsourcing projects for large financial institutions. Oliver Yaros is recommended for digital transformation projects and IP transactions.

London > Risk advisory > Data protection, privacy and cybersecurity

The team at Mayer Brown International LLP is ‘exceptional at providing astute, intelligent legal advice’. The group has particular experience in the financial services and private equity sectors and handles international data protection compliance matters, as well as high-profile cybersecurity incidents and breaches for large multinationals. Mark Prinsley heads up the team.