Senior AI Security Engineer — Agentic Platform Defender

EY is seeking an AI Security Engineer to own the security posture of EY's Agentic AI platform end to end. This role focuses on defending systems that generate and execute code, invoke tools, and operate across long delegation chains.

The candidate will work with architecture to define agent authority, implement secure-by-default contracts, and lead red-teaming and adversarial testing to meet regulator expectations.