Christophe Dumusois is a recognized expert in the field of security inks for banknotes and secure documents. Based in Berlin, he has served since 2019 as Sales Director at GSI, part of IN Groupe, a company specializing in secure printing solutions designed for central banks and high‑security printing environments. His professional career has been shaped by key roles within major industry players where he held successive positions in sales, marketing, and laboratory management, strengthening his combined technical and commercial expertise in anti‑counterfeiting technologies.