Security Engineer

Job Description: Founding Internal Security Engineer | AI-native security company | Midtown Manhattan A cybersecurity company building AI agents that detect, investigate, hunt and respond to threats at machine speed is hiring its first internal security engineer. It is one of the fastest-growing security companies of the last few years, with Fortune 500 and Global 2000 customers less than a year after launch. It is backed by some of the best-known operators in the industry, and the founders previously built detection and response products used by tens of thousands of customers. At a security company, internal security isn’t a checkbox. Customers trust this team with their most sensitive telemetry, so the company’s own environment has to meet a higher bar than anyone else’s. You’ll set that bar. What you’ll own Internal security posture end to end: identity and access, endpoint, email, network and corporate cloud Identity strategy across SSO, MFA, conditional access and privileged access Internal threat hunting and incident response, from detection through containment, investigation and post-incident review Vulnerability management, endpoint hardening and continuous monitoring Security policies, standards and documentation, built from zero SOC 2 Type II and ISO 27001 work, customer security questionnaires, and vendor risk The security-critical parts of IT, alongside an external IT provider. Day-to-day IT is light and transitional, with a dedicated IT hire planned. What you’ll bring 5+ years hands-on in security engineering or corporate security at a startup or scale-up A real threat hunting and detection background Incident response experience you can walk through end to end, from investigation to resolution, not escalation Experience building a security program, policies and documentation from scratch Depth in at least one of IAM, endpoint, cloud or SaaS security A builder’s mindset: comfortable with ambiguity, excited by zero-to-one, and genuinely interested in security and AI