Thomas Delille supports individual companies and industrial associations in the legal challenges triggered by a variety of EU regulations, with a strong focus on chemicals and other environmental, social and governance (ESG) legislations. Thomas’ practice covers the full life cycle of regulations, from influencing the inception of EU acts or decisions, to developing compliance strategies to address existing regulations. Thomas has solid EU litigation experience before EU Courts, as well as the Board of Appeal of the European Chemicals Agency (ECHA) on REACH and CLP matters. In addition, Thomas has developed longstanding expertise in addressing complex due diligence obligations in the context of biodiversity legislations (Nagoya Protocol), allowing Thomas to support clients on emerging due diligence obligations in the ESG context (EU Batteries Regulation, Deforestation and the upcoming CS3D).

Thomas was previously counsel in the regulatory and government affairs practice of another international law firm. Before that, he notably gained experience at the Court of Justice of the European Union and at the European Parliament, and was a researcher at the Centre for European Law of the University of Luxembourg.

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  • University of Luxembourg, Ph.D., 2012
  • London School of Economics, LL.M., 2011
  • Universities of Luxembourg and Strasbourg, LL.M., 2008


  • Paris, 2019
  • Brussels, 2015


  • English
  • French
  • German

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Award Mouse thought multimedia interface book medal screen monitor