Jean-Sylvain Chavanne is currently in charge of information systems security (RSSI) for the CHRU of Brest and the GHT of Western Brittany (10,000 agents). He also teaches in several schools such as the Paris School of Economic Warfare, the University of Paris Dauphine and the CNAM. He wrote in the Manuel de l'intelligence économique (PUF editions).

Jean-Sylvain Chavanne holds a master's degree in economic intelligence from the École de Guerre économique and a master's degree in cybersecurity from ESIEE IT. He spent six years at the French National Agency for Information Systems Security (ANSSI) as a project manager, deputy head of the territorial coordination office and then digital security delegate for the Pays de la Loire region. Afterwards, he managed the cyber security agency based in Brest of the company CEIS Cyberdefense.