Jean-Louis de Cartier de Marchienne ventured into various projects as an independent business owner between 1984 and 1991. He was the founder of several Belgium-based agricultural enterprises, with subsidiaries in the Netherlands and Hungary. In 1992, he joined the Board of Directors of printing and publishing company Brepols, based in Turnhout, Belgium. A few years later, in 1995, he was appointed chairman of the Board of Directors of Brepols Group and all its subsidiaries. In 1998, he became Managing Director of Cartamundi, a Turnhout-based world-leader in the production of playing cards. Today, Jean-Louis is chairman of Brepols Group and its subsidiaries and of Cartamundi. He held Board positions at Promat International and was Board member and Chairman of the Etex Board for several years. Currently he is still a director at FBNet, the Belgian branch of the international Family Business Network (FBN).
Mr. de Cartier joined the Sibelco Board in 2020 and exercises his current mandate as a permanent representative of ASSaPP.