Sébastien Guillaume is the Director of Compliance at the Belgium Treasury - Ministry of Finance, where he oversees the implementation of financial sanctions and supervises the Beneficial Ownership register. As head of the Compliance Department, he plays a central role in shaping Belgium’s regulatory framework and ensuring alignment with international standards.

He is a member of the Belgium Treasury Management Committee and serves as a policy and strategy advisor, contributing to high-level decision-making on financial governance. Sébastien previously worked as an AML/CFT supervisor and led the national implementation of Belgium’s BO register as project manager—a milestone in the country’s transparency and anti-financial crime efforts.

Internationally, Sébastien is a certified FATF trainer and recognized expert, providing technical assistance on BO register implementation across jurisdictions. His work bridges domestic policy with global best practices, reinforcing Belgium’s leadership in financial integrity and compliance.”