Lead Security Engineer, Internal and IT

Artemis is building the future of AI-driven cybersecurity, helping companies defend themselves effectively in an era where AI is fighting AI on the cyber battlefield.

Our platform brings a new approach to the $100B security operations market, building a live model of each customer's environment and using AI agents to detect, investigate, hunt, and respond to threats at machine speed. Just one year after our founding, Artemis is one of the fastest-growing cybersecurity companies of all time, with customers including multiple Fortune 500 companies, Global 2000 enterprises, and AI innovators like Cursor.

We have raised $70M from Felicis, First Round Capital, Theory Ventures, Two Sigma Ventures, Lockstep VC and Brightmind. We are also backed by some of the most prominent operators in cybersecurity, including the CEO of Crowdstrike, the former CEO and CTO of Splunk, and the founders of Abnormal AI and Demisto.

Artemis's founders have built and scaled security products used by tens of thousands of customers. Shachar Hirshberg (CEO) led Amazon GuardDuty, the world's largest cloud detection product, was an early employee at Demisto, the company that invented the SOAR category, was an engineering leader at Palo Alto Networks, and holds an MBA from Harvard. Dan Shiebler (CTO) led all AI and machine learning at Abnormal AI, the pioneer of behavior-based detection, spent five years building analytics using machine learning and vector databases at Twitter, and holds a PhD in machine learning from Oxford.

Our team of software engineers, AI researchers, security engineers, and product designers comes from Google, Meta, AWS, Wiz, CrowdStrike, SentinelOne, Abnormal AI, Perplexity, Bridgewater, Mercor, CERN, and more.

We're growing fast and looking for builders who want to help us serve our rapidly expanding customer base.

About The Role Artemis Security is hiring our first Security Engineer to own internal security at the company. In a cybersecurity company, internal security isn't a checkbox — it's a reflection of everything we sell. Our customers trust us with their most sensitive telemetry, and how we run our own environment has to meet a bar higher than anyone else's. This is a hands-on, senior IC role. You'll be the technical owner of Artemis's internal security posture, building the systems, controls, and programs that protect the company from the inside out. You'll also own the security-critical parts of our IT environment, working closely with our IT provider on execution. You'll report into leadership, partner with our founders, engineering, and security teams, and have the autonomy to build the security foundation the right way from day one. You won't be managing a team. You'll be building the program.

Responsibilities

• Own Artemis's internal security posture end to end, including endpoint security, identity and access management, network security, email security, and cloud security for our corporate environment

• Design and run our identity strategy across SSO, MFA, conditional access, and privileged access management

• Build and operate our vulnerability management program, including patching, endpoint hardening, and continuous monitoring

• Lead incident response for internal security events, from detection and containment through investigation and post-incident review

• Drive our compliance and certification work (SOC 2 Type II, ISO 27001, and others as we grow), including scoping, evidence collection, and working with external auditors

• Build and run the security awareness program, including ongoing training, phishing simulations, and role-specific education

• Set and maintain security policies, standards, and internal documentation that scale with the company

• Own vendor risk and third-party security reviews for tools and partners we bring in

• Partner with product security and engineering leadership to keep internal and product security aligned

• You’ll be working hands-on with the best security tool in the world, Artemis!

Qualifications

• 5+ years of hands-on experience in security engineering, IT security, or corporate security, with real ownership of internal security programs at a top-tier software/tech company

• Deep expertise in one or more of the following: identity and access management, endpoint security, cloud security (AWS/GCP/Azure), or SaaS security

• Hands-on experience with SOC 2 and/or ISO 27001 audits, including scoping, evidence collection, and working with auditors

• Strong understanding of modern attacker tradecraft — you know how real breaches happen, not just what the frameworks say

• Direct experience leading incident response for internal security events, from detection through post-mortem

• Familiarity with modern security tooling across EDR, SIEM, IAM, MDM, DLP, email security, and vulnerability management

• Strong systems thinking — you can balance security rigor with the reality of a fast-moving startup

• Clear communicator who can translate security tradeoffs to leadership and non-technical teams

• Comfort operating with autonomy in an early-stage environment and building programs from scratch, without a manager or team backing you up

Nice to Have

• Prior experience as the first or founding internal security hire at a startup

• Background as a practitioner in cybersecurity — SOC, threat detection, red team, or product security experience

• Relevant certifications (CISSP, OSCP, GCIA, GCIH, CISA, or equivalent)

• Experience with security operations tooling that Artemis itself sells (SIEM, XDR, detection & response platforms)

• Familiarity with regulated frameworks beyond SOC 2 and ISO (FedRAMP, HIPAA, PCI, GDPR)

Compensation We offer a competitive compensation of $180,000-$230,000 per year, and a top-of-market equity component. A variety of factors are considered when determining the compensation, including a candidate’s professional experience. Final offer amounts may vary from the amounts listed. Equal Opportunity At Artemis, we believe the best ideas come from diverse teams. We’re committed to creating an inclusive environment where people of all backgrounds, experiences, and perspectives can do their best work. We welcome everyone, regardless of race, gender, age, religion, identity, or anything else that makes you, you.