Security Engineer Lead, Security Foundations

Meta’s Security Foundations team is hiring a Security Engineer Lead to scope, design, and advance security solutions used across the company. This role establishes technical direction across multiple security domains, tackling cross-domain challenges such as agent identity and authorization, and clearly presenting the security and operational tradeoffs to senior leaders.

The position is based in Washington, DC as onsite work, with a salary range of USD 271,000 - 347,000 per year.

What you’ll do

• Set technical direction for security solutions and shared platforms, partnering with Security Engineering, Security Analyst, and Software Engineering teams.
• Identify the highest-risk items across relevant security domains company-wide, then lead development of detailed threat models and corresponding solutions.
• Define standards for how AI agents are identified, authorized, and audited across Meta infrastructure, addressing a gap where neither existing industry practice nor human-centric models are sufficient.
• Balance security outcomes with friction and cost so the organization can move quickly while maintaining strong controls.
• Drive solution design, including technical architecture, and lead implementation when required.
• Build partnerships across security, infrastructure, corporate engineering, and legal, translating ambiguous business and regulatory requirements into clear tradeoffs between securing the company and its users and avoiding unnecessary slowdown.
• Present those tradeoffs credibly to senior leadership, including VPs and C-level executives such as the CTO and CISO, to support decision-making.

What you bring

• Deep technical expertise in at least one of the relevant domains, plus the ability to become credible quickly in unfamiliar areas.
• Significant experience driving large cross-company engineering initiatives.
• Experience managing security risk and navigating tradeoffs between security controls and friction in a large organization.
• Ability to communicate and influence across functions to drive security solutions to completion.
• Capability to operate in high-ambiguity environments, balancing solution design with complex business processes and requirements.
• Hands-on engineering experience and the ability to lead across a blended Security Engineering and Software Engineering organization.

Technologies you’ll work with

• Active Directory
• Linux
• Windows
• SOX
• SOC 2

Preferred qualifications

• Experience with identity and access management, cryptographic systems, and massively scaled infrastructure.
• Experience securing AI/ML systems or agentic workloads.
• Familiarity with SOX, SOC 2, or comparable control frameworks and the engineering work required to meet them.
• Experience leading security efforts spanning both production (Linux) and corporate (Windows, Active Directory, SaaS) environments.