Guillaume Deroubaix is Deputy CEO of Lefebvre Group, the leading Legal Knowledge and Tech Company in Europe. Before joining Lefebvre in 2025, he served as CEO of Karnov Group’s Southern Europe region and President of Lamy Liaisons. Earlier, he spent 20 years at LexisNexis in senior editorial, international development and finally general management roles across France, the Middle East and North Africa. Trained in international economic law, he combines deep sector expertise with a strong track record in business transformation, technology-enabled growth, and cross-market execution.