Lead Security Engineer

Benefits

Parental leave

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Non-birth-parent leave

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Family-building benefits

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Mental health support

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Relocation assistance

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Childcare support

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Learning budget

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Verification

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Salary

$250K-$350K From the posting source checked Jun 20, 2026

401(k) match

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Role

Role function

Security From the posting source checked Jun 20, 2026

Seniority

Senior From the posting source checked Jun 20, 2026

Schedule

Shift type

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Weekend work

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Company

Company stage

Growth-stage From the posting source checked Jun 20, 2026

Equity

Offered From the posting source checked Jun 20, 2026

Application

Cover letter

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Assessment

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Deadline

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Where they hire

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About this role

Lead Security Engineer Menlo Park, California, United States About Periodic Labs The most important scientific discoveries of our time won't happen in a traditional lab. We're an AI and physical sciences company building state-of-the-art models to accelerate breakthroughs across materials, energy, and beyond. Backed by world-class investors and growing rapidly, we operate at the pace the frontier requires. Our team brings deep expertise, genuine ownership, and an insatiable drive to push the boundaries of what's scientifically possible. About the Role You will lead, design, build, and operate security engineering at Periodic Labs. You will secure the systems that power our research and operations, including authentication, cloud environments, clusters, internal developer platforms, identity systems, secrets, SaaS access patterns, and lab-adjacent infrastructure. You will work closely with research, infra, lab, and operations teams to reduce risk without slowing down experimentation. This is a hands-on engineering role. You will write automation, ship controls, lead incident response, and raise the bar for how we design secure systems. You will set pragmatic standards and build tooling that makes the secure path the easy path for the rest of the company. What You'll Do - Own security architecture across cloud, Kubernetes, internal services, and research infrastructure - Design and operate identity and access systems for both people and workloads, including SSO, MFA, RBAC, SCIM lifecycle automation, workload identity, and least-privilege access patterns - Build and improve secrets management across the company, including KMS, GitHub and CI credentials, 1Password or equivalent systems, and secure service-to-service authentication -

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