Senior AI Security & Platform Defense Leader

EY; Stamford (CT); Remote; USD 120,000 - 190,000; Full time

Job summary

EY is seeking an AI Security Engineer to own the security posture of EY’s Agentic AI platform end to end. The role covers attacking and defending a platform that can generate and execute code, invoke tools, and operate across diverse environments from cloud to air-gapped systems.

You will define security controls, perform red teaming, and oversee supply-chain integrity and policy-as-code to satisfy client and regulator requirements.

Qualifications

• Extensive experience in security engineering for AI platforms.
• Strong background in cloud-native security, identity and secrets, and container hardening.
• Ability to design threat models and implement guardrails for autonomous agents.

Responsibilities

• Own the security posture of EY's Agentic AI platform end to end across deployment targets.
• Define and implement the security engineering controls for all platform layers.
• Lead defense against agentic threat classes including prompt injection and jailbreak risks.
• Lead AI red teaming and adversarial testing to validate guardrails and containment.
• Manage supply-chain integrity, signing, attestation, and policy-as-code across the stack.
• Define tenant isolation and data governance as part of platform security.

Job description

EY is seeking an AI Security Engineer to own the security posture of EY’s Agentic AI platform end to end. The role covers attacking and defending a platform that can generate and execute code, invoke tools, and operate across diverse environments from cloud to air-gapped systems.

You will define security controls, perform red teaming, and oversee supply-chain integrity and policy-as-code to satisfy client and regulator requirements.