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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

New European Regulation on Air Passenger Rights: What impact for the air transport sector?

New European Regulation on Air Passenger Rights: What impact for the air transport sector?

25 Jun 2026 6 min read
European Commission's call for evidence on a new European Aviation and Aerospace Strategy

European Commission's call for evidence on a new European Aviation and Aerospace Strategy

19 May 2026 3 min read
Dawn raids by the Belgian Competition Authority in the road signage and street furniture sectors

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

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

24 Oct 2025 3 min read
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