Isabelle Theisen

Isabelle Theisen serves as the Group Chief Information Security Officer at Nomura, a global financial services group, since January 2024. Prior to this role, Isabelle held the position of Chief Information Security Officer and Managing Director at Credit Suisse from October 2022 to January 2024 and at Société Générale from January 2019 to March 2023. Previous experience includes serving as Chief Information Security Officer at Deutsche Bank, Cyber CISO For Hire, LLC, and Caesars Interactive Entertainment Inc., along with Chief Security Officer at First Advantage Corporation. Isabelle's earlier roles encompass Vice-President of Information Security at Warner Bros., Information Security Officer at NBC/Universal Studios, and Global Chief Information Security Officer at American Express. Isabelle holds a Master’s degree in Financial Management and Computer Sciences from California State Polytechnic University-Pomona.