For its 50th anniversary, DELSOL Avocats opened an office in Brussels, Belgium, marking a new step in the firm’s development.

DELSOL Avocats assists clients daily with their international issues, whether they are French and developing projects abroad, or international with operations in Europe. The Firm was therefore keen to expand into Belgium, in order to provide an increasingly specialised and quality service to both international clients, and to its Belgian and French clients.

Number of professionals: 200 (130 lawyers) between France and Belgium

Fields of law

  • Administrative and Public Law
  • Civil Law
  • Commercial property
  • Competition
  • Construction law
  • Corporate law
  • Credit and Insolvency
  • Damages and Insurance
  • Data Protection
  • Dispute resolution
  • Employment and pensions
  • EU Law
  • Governmental & Regulatory
  • Industrial & Intellectual Property
  • M&A
  • Non-profit Organizations
  • Patents and trademarks
  • Real Estate law
  • Social Security
  • Tax
  • Trade and Distribution
  • White collar crime

Sébastien Popijn

Sebastien's practice is mainly focused on Corporate/M&A, Aviation Law (including regulation EU261), Data Protection Law and Dispute Resolution.
He holds a Master in Law from the Université catholique de Louvain, a Certificate in Transnational Law from the University of Geneva and a Bachelor in Law from the Facultés Universitaires Saint-Louis.
He is an attorney at the Brussels Bar.



Avenue Louise 480, 1050 Brussels

+32 479 30 84 58


  • CEW & Partners success in court in challenge to Belgian government May 27, 2022
    The Public and Administrative Law Department of CEW & PARTNERS, represented by Jean LAURENT and Charline SERVAIS, has won an important victory against the Belgian Federal Government in the Liège Court of Appeal. CEW represented the Belgian Federation of Real Estate Agents in a legal challenge to specific COVID regulations which purported to prevent real…
    One of the  questions that airlines must now ask themselves is whether the compensation (“EU261 compensation”) provided for in Article 7 of Regulation No 261/2004 (“Regulation EU261”) is due in the event of cancellation or delay of more than 3 hours related to Covid-19. The right to EU261 compensation does not apply to cancellations made…