Senior Attack Engineer, OCI

Get to Know Us Horizon3.ai is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find, fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZeroTM platform, delivers production-safe autonomous pentests and other key assessment operations that scale across the largest internal, external, cloud, and hybrid cloud environments. NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises. It is used by IT Ops/SecOps teams, consulting pentesters, and MSSPs and MSPs. We are a fusion of former U.S. Special Operations cyber operators, startup engineers & operators, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools and false positives, resulting in alert fatigue, blind spots, "checkbox” security culture, cybersecurity skills shortage, and the long lead time and expense of hiring outside consultants. Collectively, we are a team of learn it alls, committed to a culture of respect, collaboration, ownership, and results.

About The Role We're looking for an Attack Engineer with Oracle Cloud Infrastructure (OCI) expertise to help build the next generation of cloud attack capabilities within NodeZero. This is a highly strategic role. As OCI adoption continues to grow among large enterprises, government organizations, and AI-focused infrastructure providers, our customers are increasingly asking for deeper OCI coverage. We already support AWS and Azure, and we're making a significant investment in OCI as the platform continues to gain traction among hyperscale customers and critical enterprise environments. You'll join our NodeZero Attack team and join a team of engineers building OCI attack content from the ground up. You'll research Oracle Cloud services, identify attack paths and misconfigurations, develop offensive capabilities, and help develop how NodeZero assesses Oracle Cloud environments at scale. This is not a maintenance role. You'll serve as an attack engineer implementing Horizon3's OCI offensive security strategy and will have a first-hand influence on how OCI attacks are integrated into the platform.

What You’ll Do

• Conduct research into OCI attack paths, identity and trust relationships, service misconfigurations, and emerging attacker techniques.

• Design, implement, and validate production-quality Python attack capabilities spanning OCI IAM, service accounts and workload identities, compute, Kubernetes/OKE, storage, databases, secrets, networking, and other cloud-native services.

• Chain individual weaknesses into realistic attack paths, with reliable proof of exploitability and clear, actionable customer outcomes.

• Build and maintain safe, repeatable attack logic and supporting tests; investigate failures and improve reliability, precision, and maintainability.

• Collaborate closely with software engineers, attack engineers, and offensive security SMEs to bring new capabilities into production.

• Practice rigorous software development practices to implement OCI-based attack paths based on direction from the technical lead and team manager.

What You’ll Bring Required

• Hands-on experience with OCI security and offensive cloud operations, including the ability to reason about IAM permissions, service identities, trust, and resource access.

• Advanced understanding of cloud attack paths and cloud-native security concepts.

• Python engineering skills and experience turning security research or manual techniques into dependable production quality automation or product capabilities.

• Passion for building products, not just finding vulnerabilities.

• 4+ years of professional software engineering and or/ offensive security experience

• Experience with cloud penetration testing, red teaming, offensive security research, or building cloud security products.

• Documented history of collaboration with diverse engineering teams to develop products as an individual contributor

Preferred

• Experience with cloud privilege escalation and identity attacks.

• Familiarity with AWS, Azure, or GCP offensive security.

• Experience integrating security research into production software.

• Experience with OKE, Kubernetes, Terraform, Oracle Cloud APIs, or cloud-native CI/CD.

• Contributions to security research, open-source projects, conference talks, or vulnerability disclosure.

• Experience mapping cloud attack coverage to frameworks such as MITRE ATT&CK for Cloud.

Travel Required We are a fully remote company, and this job may require up to 10% of travel to be successful.

Compensation and Values At Horizon3, we believe that our people are our greatest asset, and our compensation philosophy reflects this core value. We are committed to fostering an environment where all employees feel valued, respected, and rewarded for their contributions. Our compensation structure is designed to be fair, competitive, and transparent, ensuring that every team member is recognized and compensated equitably across roles, levels, and locations. In accordance with various State’s transparency regulations, we provide the following salary range information for this position:

• Base salary range: $206,278 - $242,680. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills.

• Additional compensation: All full-time roles are eligible for an equity package in the form of stock options.

Perks of Horizon3

• Inclusive Team: We value diversity and promote an inclusive culture where everyone can thrive.

• Growth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities.

• Innovative Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking.

• Hybrid & Remote Work: We embrace a mix of remote and hybrid work models depending on role and location, including our Chicago office, where some roles require regular in-office presence.

• Competitive Compensation: We offer competitive salary, equity and benefits. Our benefits include health, vision & dental insurance for you and your family, a flexible vacation policy, and generous parental leave.

You Belong Here Horizon3 is not just an equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success. We are dedicated to fostering a workplace where everyone feels welcome and respected, regardless of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, hair length or any other legally protected status by law. Our commitment to diversity and inclusion means we strive to attract, develop, and retain a workforce that reflects the varied communities we serve. We believe that diverse perspectives drive innovation and strengthen our ability to create cutting-edge cybersecurity solutions. At Horizon3, every team member is valued and supported in an environment that encourages personal and professional growth. We welcome candidates from all backgrounds and experiences, and we encourage all qualified individuals to apply. Come be a part of Horizon3, where your unique contributions are recognized, and your potential is limitless.

Other Duties Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Duties, responsibilities, and activities may change at any time with or without notice.

Application Note In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.