Guillaume began his law studies at the University of Namur in 2013 and obtained his bachelor's degree in 2016. He then continued his studies at the Université Catholique de Louvain. After a first year master's degree followed in the health law option, Guillaume spent a quadrimester at the University of Uppsala (Sweden) as part of an Erasmus exchange.
When he obtained his Master's degree in Law at the Université Catholique de Louvain in 2018, Guillaume deepened his knowledge by following the Master of Specialization in Information and Communication Technologies Law at the University of Namur.
After a first professional experience in a hospital environment, he decided to join the firm to practice as a lawyer at the Brussels Bar.