{"id":12962,"url":"https://alion.io/job/horizon3-staff-attack-engineer-aillm","title":"Staff Attack Engineer, AI/LLM","company":{"id":3088,"name":"Horizon3","domain":"horizon3.ai","url":"https://alion.io/company/horizon3","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":75,"open_postings":16,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":39,"computed_at":"2026-10-16T05:45:00Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"staff","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["US"],"hiring_countries_total":1,"salary":{"min":235000,"max":275000,"currency":"USD","period":"year","gross":null,"usd_annual":275000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agentic Workflows","optional":false},{"name":"AI Agents","optional":false},{"name":"Hallucination","optional":false},{"name":"LLM","optional":false},{"name":"LLM Guardrails","optional":false},{"name":"OWASP Top 10","optional":false},{"name":"Python","optional":false},{"name":"Structured Outputs","optional":false},{"name":"Threat Modeling","optional":false},{"name":"Tool Use","optional":false},{"name":"AWS","optional":true},{"name":"AWS Bedrock","optional":true},{"name":"AWS Bedrock AgentCore","optional":true},{"name":"Azure","optional":true},{"name":"GCP","optional":true},{"name":"Neo4j","optional":true},{"name":"OpenAI","optional":true},{"name":"Vertex AI","optional":true}],"status":"live","first_seen_at":"2026-04-10T15:28:25Z","employer_posted_date":"2026-04-10","last_verified_at":"2026-10-16T09:49:20Z","board_verified":true,"closed_at":null,"days_open":188,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":188},"description":"Get to Know Us\nHorizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find and 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 ITOps/SecOps teams, consulting pentesters, and MSSPs and MSPs.\nWe are a fusion of former U.S. Special Operations cyber operators, startup engineers, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools, 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.\nSummary\nWe are hiring a Staff Attack Engineer specializing in AI/LLM security to join our team. You will break AI and agentic systems and turn that research into automated attacks inside NodeZero, our autonomous pentesting platform.\nThis is not consulting or manual pentesting; the goal is to build repeatable, scalable attack patterns that run autonomously across customer environments. You’ll also help drive our LLM-powered offensive capabilities and act as a technical leader for AI/LLM offense.\nEssential Functions\nAttacking AI/LLM Systems\nBreak AI and agentic systems and translate that research into automated, repeatable attack modules for NodeZero.\n\nDesign and execute prompt injection and defense evasion attacks, focusing on generalized, reusable patterns.\n\nConduct tool-use exploitation, abusing LLM agents’ access to code, file systems, APIs, and databases for attacker-realistic outcomes (e.g., context poisoning, RCE, data exfiltration, privilege escalation).\n\nTarget AI infrastructure (model serving, training pipelines, vector databases, GPU/MLOps tooling) with an understanding of real-world enterprise deployments and misconfigurations.\n\nResearch and apply model and supply chain attacks (poisoning, training data extraction, adversarial inputs, deployment pipeline abuse).\n\nPerform threat modeling for agentic systems, mapping trust boundaries and attack surfaces and turning them into concrete attack paths.\n\nApply a strong productization mindset, turning manual techniques into safe, reliable, and scalable automated tooling.\n\nBuilding with LLMs\nBuild and extend LLM-powered applications (prompting, structured output, agentic workflows).\n\nDesign with production concerns in mind: cost, safety and hallucination guardrails, reliability, and observability.\n\nDesign and extend microservices that orchestrate LLM tasks and integrate with NodeZero and related offensive workflows.\n\nCompetencies / Requirements\nExpert-level Python and software engineering skills.\n\nSolid penetration testing fundamentals and understanding of common attack chains.\n\nFamiliarity with AI/LLM security frameworks (e.g., OWASP Top 10 for LLMs, MITRE ATLAS).\n\nExperience in a security product or offensive security team, ideally with shipped offensive capabilities or tooling.\n\nProven ability to break AI/LLM and agentic systems.\n\nClear understanding of trust boundaries around AI tools, data sources, and permissions, and how to systematically test and exploit them.\n\nExpert-level ownership - drives high-complexity, high-risk programs and sets strategy, not just execution.\n\nSelf-motivated - identifies problems and builds solutions proactively.\n\nIndustry obsessed - tracks the fast-moving AI security landscape and can speak to recent developments, new attacks, and where the field is heading.\n\nNice-to-Have\nExperience with other cloud AI services (e.g., Azure OpenAI, GCP Vertex AI).\n\nContributions to AI security research (blog posts, conference talks, CVEs, open-source tools).\n\nExperience with AWS Bedrock and AWS Agent Core.\n\nFamiliarity with graph databases (e.g., Neo4j).\n\nBackground in traditional exploit development or vulnerability research.\n\nCTF experience, particularly in AI/ML-focused challenge categories.\n\nPerks of Horizon3\nInclusive Team: We value diversity and promote an inclusive culture where everyone can thrive.\n\nGrowth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities.\n\nInnovative Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking.\n\nRemote Work: We are a 100% remote company. Enjoy the convenience and work-life balance that comes with remote work.\n\nCompetitive 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.\n\nCompensation and Values\nAt 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.\nIn accordance with various State’s transparency regulations, we provide the following salary range information for this position:\nBase salary range: $235,000 - $275,000 annually. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills.\n\nAdditional compensation: All full-time roles are eligible for an equity package in the form of stock options.\n\nYou Belong Here\nHorizon3 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, or any other legally protected status by law.\nOur 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.\nWe 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.\nOther Duties\nPlease 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. 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