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Sébastien Willems
Associate

Sébastien Willems

Languages
  • French
  • English
  • Dutch
Social media

Sébastien Willems specialises in European law, with a particular focus on State Aid and Competition law.

His state aid practice covers a wide range of aid schemes. In particular, he assists public entities and undertakings in preparing and submitting notifications of aid schemes to the European Commission.

In the field of competition law, he advises and represents clients before the Belgian and European courts and authorities, particularly in relation to mergers but also cartels (horizontal and vertical agreements).

Sébastien also has experience in Belgian commercial law, particularly in distribution.

Publications

  • B. GIELEN, S. WILLEMS, "Belgium", Developments in National Competition Laws (July 1, 2023 - September 30, 2023), WuW, 12/2023, p.664.

Education

  • 2023 - Vrije Universiteit Brussel (L.L.M. in European and international law)
  • 2022 - Bar admission (Brussels, Belgium)
  • 2021 - Université Libre de Bruxelles (Master of Laws)
  • 2019 - Université Saint-Louis UCLouvain, Brussels - Belgium (Bachelor of Laws)

Insights by Sébastien

Dawn raids by the Belgian Competition Authority in the road signage and street furniture sectors

25 Mar 2026 3 min read

BCA gives the green light to the Flemish Region’s majority acquisition of Brussels Airport

24 Oct 2025 3 min read

Opinion of the Belgian Competition Authority on a price list for veterinary services

25 Sep 2025 4 min read

State aid: European Commission consults on revision of General Block Exemption Regulation

01 Aug 2025 3 min read
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