In December 1991, he started working for Stibbe Simont Monahan Duhot in Brussels, where he became a partner in 1996, a member of the recruitment committee and then member of the management board. In 1995, he was among the lawyers that worked on the merger of Crédit Communal de Belgique and Crédit Local de France to create Dexia.
He began his professional journey at Stibbe Simont Monahan Duhot in Brussels in December 1991, advancing to become a partner by 1996. He also played significant roles in the recruitment committee and management board before contributing to the creation of Dexia in 1995 through the merger of Crédit Communal de Belgique and Crédit Local de France.