Senior AI Security Engineer - Platform & Threat Defense

EY; Pittsburgh (Allegheny County); On-site; USD 151,000 - 251,000; Full time

Benefits offered by this job

Competitive compensation

Medical and dental coverage

Paid time off

401(k)

Job summary

EY seeks an AI Security Engineer to own the security posture of EY’s Agentic AI platform end to end. The role covers threat modelling, defense against prompt injection, and protection across cloud to air-gapped deployments in highly regulated environments.

You will define security controls for every layer, lead red-teaming, secure the supply chain, and work with architecture to shape an authority model that keeps agent actions within initiator bounds.

Qualifications

• Bachelor’s or Master’s degree in Computer Science, Security, or a related technical field.
• 10+ years in security engineering, security engineering, or offensive security, including hands-on production ownership.
• Demonstrable depth in cloud-native and Kubernetes security: admission control, network policy, workload isolation, and runtime security in production.
• Hands-on experience with workload identity and secrets management (SPIFFE/SPIRE, Vault/OpenBao or equivalents) and with PKI and certificate lifecycle.
• Practical experience securing AI or ML systems in production, including familiarity with LLM and agentic attack surfaces, such as prompt injection, tool abuse, excessive agency, and model or data supply-chain risk.

Responsibilities

• Own platform threat model: covering agent autonomy, tool invocation, delegated authority, model and data supply chain, multi-tenancy, and every deployment target from cloud to air-gapped, and keep it current as the platform evolves.
• Define the security engineering and control set for every platform layer: infrastructure and boot chain, Kubernetes and cluster fabric, identity and secrets, secure execution and sandboxing, gateway and egress, data and state, delivery pipeline, and telemetry.
• Set the secure-by-default contract so that platform capabilities arrive hardened, including agent templates, Helm charts, sandbox profiles, and network policy ship with correct controls rather than requiring teams to add them.
• Own defense against agentic threat classes including direct and indirect prompt injection, jailbreak and instruction hijacking, excessive agency, confused-deputy and authority-escalation attacks, tool and function-call abuse, memory and context poisoning, and retrieval-augmented data exfiltration.
• Work with the architecture team to help define the agent authority model: delegated and on-behalf-of authority, scope and delegation-depth limits, consent boundaries, and the non-escalation invariant that an agent never exceeds the authority of its initiating principal at any hop.
• Own the sandboxing security standard for agent-generated code execution: isolation boundaries, filesystem and credential scope, egress restriction, resource containment, and the escape-test suite that proves the boundary holds.
• Secure the model and knowledge supply chain: model provenance and integrity, upstream registry governance, poisoning and backdoor risk, embedding and vector-store integrity.
• Secure agent-to-agent and tool protocols including MCP and A2A surfaces: discovery trust, tool registration and approval, schema validation, and authorization of inter-agent calls.
• Lead AI red teaming and adversarial testing: build the offensive capability and the recurring exercise cadence that tests guardrails, sandboxes, and authority boundaries before adversaries and auditors do.
• Own supply-chain integrity end to end: artifact signing and verification (Sigstore/Cosign, Notation), SBOM generation and attestation, provenance and SLSA-aligned build integrity, CVE management, dependency and license governance.
• Own admission and runtime policy: policy-as-code across Kyverno and OPA, signature-verification enforcement, Pod Security Standards, and the guardrails that make non-compliant workloads unschedulable rather than merely reported.
• Define Kubernetes and infrastructure hardening baselines: CIS-aligned cluster configuration, network default-deny and segmentation, node and boot-chain integrity, GPU and DPU isolation, and secrets-handling standards.
• Own tenant isolation assurance: the security definition of a tenant boundary across compute, network, storage, secrets, telemetry, and evidence, and the testing that proves cross-tenant leakage is not possible.
• Serve as the security authority in client engagements: lead security engineering reviews, respond to client CISO and regulator scrutiny, and produce the assurance artefacts that unblock deployment into regulated environments.
• Drive security detection and response for the platform: detection engineering for agentic misbehavior, security telemetry requirements, alerting, incident response playbooks, and post-incident review.

Skills

Cloud-native security

AI threat models

Zero-trust

Policy-as-code

Supply-chain security

Red teaming

Communication

Education

Bachelor’s or Master’s degree in CS/Security

Tools

SPIFFE/SPIRE

PKI

Cosign

Sigstore

Kyverno

OPA

Job description

EY seeks an AI Security Engineer to own the security posture of EY’s Agentic AI platform end to end. The role covers threat modelling, defense against prompt injection, and protection across cloud to air-gapped deployments in highly regulated environments.

You will define security controls for every layer, lead red-teaming, secure the supply chain, and work with architecture to shape an authority model that keeps agent actions within initiator bounds.