Principal Infrastructure Security Architect

OpenAI; United States; On-site; USD 347,000 - 490,000; Full time

Job summary

OpenAI is seeking a Principal Security Engineer to join the InfraSec team to safeguard OpenAI’s research and production environments, spanning GPU clusters, multi-cloud infrastructure, datacenters, networking, storage, and critical services. You will set technical direction and drive high-impact security programs across OpenAI-scale platforms.

You will own end-to-end outcomes, design multi-layer security controls, and mentor engineers while collaborating with cross-functional teams to reduce

Qualifications

• Deep understanding of security principles, best practices, and common vulnerabilities, including strong security judgment under ambiguity.
• A proactive mindset with automation to close gaps and improve tooling.
• Expertise with frontier models and agents to address security challenges.
• Track record leading large, cross-org initiatives from concept to rollout with measurable risk reduction.

Responsibilities

• Own end-to-end security outcomes for one or more critical infrastructure areas, including multi-quarter strategy, roadmap, and delivery.
• Design and build security controls across diverse layers (physical hardware, firmware/BMC, OS, Kubernetes, networks, and CI/CD).
• Lead cross-functional programs to deploy security enhancements and control changes at scale.
• Take a generalist approach to building security controls balancing security and reliability.
• Lead threat modeling and design reviews for major infrastructure changes.
• Mentor engineers across InfraSec and partner teams to foster a strong security culture.

Skills

Security leadership

Cloud security

Kubernetes security

Threat modeling

Automation tooling

Cross-functional collaboration

Job description

OpenAI is seeking a Principal Security Engineer to join the InfraSec team to safeguard OpenAI’s research and production environments, spanning GPU clusters, multi-cloud infrastructure, datacenters, networking, storage, and critical services. You will set technical direction and drive high-impact security programs across OpenAI-scale platforms.

You will own end-to-end outcomes, design multi-layer security controls, and mentor engineers while collaborating with cross-functional teams to reduce