Lead AI Security Engineer: Defender of Agentic Platform

Ernst & Young Oman; San Mateo (CA); Remote; USD 140,000 - 190,000; Full time

Job summary

EY in the United States seeks an AI Security Engineer to own the security posture of EY's Agentic AI platform end to end. This role covers threat modeling, security engineering, and policy-as-code across cloud-native stacks, Kubernetes, and sandboxed execution.

You will defend against prompt-injection, agent authority, and supply chain risks, presenting assurance to CISOs and regulators. The candidate will lead audits, establish secure-by-default contracts, and drive defense against advanced

Qualifications

• Proven ability to design and maintain platform threat models.
• Experience with red team exercises and defense.
• Knowledge of agentic AI security and prompt-injection risks.
• Strong understanding of CI/CD pipelines and secure delivery.
• Ability to communicate security posture to CISOs/regulators.

Responsibilities

• Own the platform threat model across deployments.
• Define security engineering and controls for each layer.
• Set secure-by-default contracts for agent platforms.
• Defend against agentic threat classes including prompt injection.
• Collaborate with architecture to define the agent authority model.
• Own sandboxing standards for code execution.
• Secure model and knowledge supply chain.
• Secure agent-to-agent protocols and inter-agent calls.

Skills

Threat modelling

Red teaming

Cloud-native security

Kubernetes security

Policy-as-code

Tools

Kubernetes

Helm charts

Sandboxing

Job description

EY in the United States seeks an AI Security Engineer to own the security posture of EY's Agentic AI platform end to end. This role covers threat modeling, security engineering, and policy-as-code across cloud-native stacks, Kubernetes, and sandboxed execution.

You will defend against prompt-injection, agent authority, and supply chain risks, presenting assurance to CISOs and regulators. The candidate will lead audits, establish secure-by-default contracts, and drive defense against advanced