John “JD” Denning serves as the Interim Chief Executive Officer of FS-ISAC, the member-driven, not-for-profit organization that advances cybersecurity and resilience in the global financial system. He joined FS-ISAC as Chief Security Officer in January 2024, where he led the organization's cybersecurity, physical security, enterprise risk management, and technology functions. In this role, he helped to strengthen sector-wide resilience by curating and disseminating foundational cybersecurity practices and translating insights from leading cyber defense programs into actionable guidance for financial institutions of all sizes.

Prior to joining FS-ISAC, Denning spent more than thirteen years at Bank of America, helping lead enterprise efforts to address an increasingly complex and dynamic threat landscape. Most recently, he served as the Global Compliance and Operational Risk Executive, overseeing second-line risk management for Global Markets Technology, Global Markets Operational Technology, and Global Banking Technology. His work focused on risk identification, oversight, and mitigation across critical technology environments supporting global financial operations.

Earlier in his career, Denning served as Director of External Affairs for the U.S. Department of Homeland Security's Office of Cybersecurity and Communications, where he helped advance national cybersecurity and critical infrastructure initiatives. He also spent eleven years as a congressional staff member, focusing on cybersecurity, telecommunications policy, and critical infrastructure protection.

Denning is widely recognized for his leadership at the intersection of cybersecurity, operational resilience, risk management, and public-private collaboration. Throughout his career, he has worked to strengthen partnerships among government agencies, financial institutions, and industry stakeholders to address emerging threats and improve collective defense.