Head of Security & IT — AI‑Security Leader, Equity

Theory Ventures; New York (NY); On-site; USD 180,000 - 280,000; Full time

Benefits offered by this job

Medical, Dental, Vision, Life and AD&D

Stock option grant

Flexible paid time off

401(k) plan

Job summary

Allium is hiring a hands-on security leader to own the security program and employee IT environment. You’ll set priorities, implement controls, and partner with Engineering and business teams to protect systems and data our company relies on.

As AI changes software and attacker tactics, you will build defenses against credential theft, compromised dependencies, and fast-moving threats while shaping a growing security function with the team and tooling we need.

Qualifications

• 6+ years of security engineering, infra security, or corporate security experience.
• Hands-on experience implementing controls in cloud-based environments.
• Depth across identity, cloud/app security, detection and response, or endpoint security.
• Experience building or improving a security program at a growing technology company.
• Practical judgment about AI-enabled tools and how to control access and validation.
• Clear communication with engineers, business leaders, customers, and providers.

Responsibilities

• Own the security roadmap; prioritize risks and translate into controls with ownership.
• Set the security approach for AI agents and test for prompt injection and misuse.
• Own employee IT and workforce security; manage devices, identities, and SaaS controls.
• Strengthen cloud and software security; reduce standing privilege and ensure secure development.
• Lead detection, response, and recovery across cloud, identity, development, and production.
• Build fast, evidence-based vulnerability response with patching and containment.
• Support enterprise trust through audits, vendor security reviews, and evidence collection.

Skills

Security engineering

Cloud security

Identity management

Detection & response

End-to-end security

AI security

Tools

CI/CD

Job description

Allium is hiring a hands-on security leader to own the security program and employee IT environment. You’ll set priorities, implement controls, and partner with Engineering and business teams to protect systems and data our company relies on.

As AI changes software and attacker tactics, you will build defenses against credential theft, compromised dependencies, and fast-moving threats while shaping a growing security function with the team and tooling we need.