Dr. Thomas Delille is counsel in the Brussels office of Mayer Brown’s International Trade and Public Policy, Regulatory & Political Law practices. He focuses on EU regulatory matters. He advises companies, consortiums and trade associations on a wide range of EU regulatory issues including REACH, the Nagoya Protocol to the UN Convention on Biodiversity, CLP, biocides, product safety, transportation of dangerous goods and waste management (Packaging Waste, RoHS and WEEE). He is also involved in cases before the European Court of Justice and ECHA Board of Appeal.

Thomas has extensive experience in the field of EU administrative law and a good understanding of complex decision-making processes within EU institutions and agencies. He wrote his doctoral thesis on Impact Assessment in the EU, with the title : “L’Analyse d’impact en droit de l’Union européenne” (Larcier, 2013).

Prior to joining Mayer Brown in 2014, he worked as a research associate at the Centre of European Law of the University of Luxembourg and gained experience at the European Court of Justice and in the competition law team of a leading French firm. In addition to his PhD in Law from the University of Luxembourg, Thomas also holds a Master of Laws degree (LL.M) from the London School of Economics and Political Science (UK) and achieved his initial legal education in France, at the universities of Strasbourg and Lyon.

Thomas is fluent in English in addition to his native French, and he has working knowledge of German.

* Dr. Delille’s name has been misused in an email scam involving the recovery of stolen funds; if you have received a suspicious communication from Dr. Delille please check that it is genuine.


  • Englisch
  • Französisch
  • Deutsch


University of Luxembourg, PhD in Law, Summa Cum Laude

London School of Economics and Political Science, LLM, Merit

Universities of Strasbourg & Luxembourg, LLM, Magna Cum Laude

Université de Strasbourg III, Maîtrise en droit, Cum Laude

University of Lyon, Jean Moulin III, Licence en droit


  • Bruxelles, Belgien


  • Member of the European Commission ABS Consultation Forum on Horizontal Guidance on the EU Regulation Implementing the Nagoya Protocol.
  • Member of the European Commission Guidance Development Expert Group for the Cosmetics sector to develop Sectoral Guidance on the EU Regulation Implementing the Nagoya Protocol.