James Harrison is an associate in the Antitrust & Competition practice seconded to the Brussels office. His experience includes advising clients in a broad range of sectors in respect of international cartel investigations, competition law compliance issues and internal investigations, and multi-jurisdictional merger control. He also advises multinational businesses in respect of Brexit-related risks.

James is also a member of Mayer Brown's Public Procurement Group and advises clients in respect of UK/EU public procurement law.

James joined Mayer Brown as a trainee in 2016, and during his training contract spent three months on secondment to the securities lending team of a global bank. As an associate, James was seconded to a major Lloyd's managing agent for six months, where he advised on a broad range of commercial and litigation issues as part of the in-house legal team.


  • Anglais
  • Espagnol


King's College London, Postgraduate Diploma in EU Competition Law

BPP Law School, LPC

University of Sheffield, LLM International and European Law

University of Sheffield, LLB Law with Spanish

Inscriptions au Barreau


  • England and Wales