Guillaume is a co-founder of Zealience. He holds a PhD in IoT cybersecurity.

As a former Senior Security Expert at UL Solutions, he helped IoT manufacturers prepare for the RED DA by performing evaluations against product security standards such as ETSI EN 303 645 and IEC 62443-4-2.

He has contributed to the drafting of EN 18031 and also trained a Notify Body for RED DA assessments.

He previously worked at Forescout on automotive security and developed intrusion detection systems for in-vehicle networks.

He is also a seasoned IoT vulnerability researcher and disclosed CVEs found in medical devices to Siemens Healthineers.

His research on IoT security led him to obtain a US patent: He invented a novel approach to enhance the accuracy of IoT device classification leveraging machine learning algorithms (US20220353153).