SOC Analyst

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 NodeZero™ 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. What You'll Do We are seeking a skilled SOC Analyst to join our growing Security Operations team. This is a mid-level role for an analyst who has developed strong foundational skills in Security Information and Event Management (SIEM) and is ready to take ownership of monitoring, triage, and detection work with minimal day-to-day direction. Working within one of our SOC shifts and reporting to the SOC Manager, you'll monitor the health and effectiveness of our SIEM platform (Elastic SIEM or equivalent) and support threat detection, log analytics, and incident response in a high-scale, cloud-native environment. As you grow, you'll take on more complex detections and investigations, contribute process improvements, and help onboard newer analysts. This role is instrumental in helping us scale and mature our security detection and response capabilities while maintaining a strong security posture across the organization. This role will be responsible for….. - Monitor, detect, and respond to security events across enterprise environments using the SIEM - Support log ingestion, parsing, and normalization, and monitor ingestion health across critical sources (AWS, Okta, endpoints, firewalls, SaaS), partnering with system owners to close telemetry gaps - Build and maintain dashboards, visualizations, and KPIs that demonstrate SIEM effectiveness and security visibility - Triage, investigate, and validate alerts, escalating confirmed or ambiguous incidents to a Senior Analyst or the SOC Manager with clear context - Tune and test detection rules (behavioral, heuristic, signature-based) to reduce false positives and improve fidelity - Use frameworks such as MITRE ATT&CK to contextualize detections and identify coverage gaps - Analyze logs across cloud, endpoint, network, and application sources to surface anomalies and potential threats - Perform structured investigations and root cause analysis, providing attack-chain mapping and remediation guidance for escalated alerts - Follow and help refine response playbooks for common incident types (phishing, suspicious logins, endpoint malware, privilege escalation, cloud misconfiguration), documenting lessons learned to strengthen detection logic - Contribute to SOAR automation (e.g., Tines or similar) to reduce manual toil and improve mean time to detect (MTTD) and respond (MTTR) - Use LLM/AI-assisted tooling to speed up triage, log summarization, and investigation enrichment, and contribute to SOC AI agent and automation workflows, verifying model output before acting on it - Participate in proactive threat hunting and contribute to weekly and monthly reporting on threat trends, false-positive reduction, and detection efficacy - Communicate clearly with shift peers and stakeholders, and, as you progress toward P3, help train and onboard more junior analysts - Demonstrate a commitment to integrity, process improvement, and customer satisfaction WHAT YOU'LL BRING - Must have hands-on SOC or security-analyst experience spanning SIEM monitoring, alert triage, detection tuning, and incident response - Must have working experience with an enterprise SIEM such as Elastic SIEM (preferred), Splunk, Microsoft Sentinel, QRadar, or similar - Must have a solid grasp of log analysis, security telemetry, and event correlation - Must have proficiency with detection-rule authoring and query languages (KQL, Lucene, SPL) and scripting in Python, Bash, or PowerShell - Must have familiarity with at least one major cloud (AWS, GCP, or Azure) and its security tooling - Must have working knowledge of MITRE ATT&CK, NIST, and CIS - Must have practical familiarity with using LLMs / AI assistants at work, including effective prompting, grounding re