Security Manager, Horizon3
$160-190k
+ Equity
Autonomous security solutions
Be an early applicant
Autonomous security solutions
201-500 employees
Be an early applicant
$160-190k
+ Equity
201-500 employees
Company mission
To help find and fix attack vectors before attackers can exploit them.
Role
Who you are
- The Startup Scale-Up Veteran: You have lived through the rapid growth of a tech startup (Series B/C+) and know how to build systems today that won't break when the company triples in size tomorrow
- The Automation Architect: You don't just automate for speed; you automate for security. You have experience building scalable detection sequences and believe that Tier 1 tasks should be handled by AI-driven bots and intelligent routing
- Analytical Framework Mastery: You think in frameworks. You can look at a gap in visibility and immediately map it back to MITRE ATT&CK or NIST CSF to prioritize the fix
- Technical Intelligence Analyst: You have the "private eye" mindset needed for OSINT and Dark Web intelligence, with the technical ability to turn that intel into actionable SIEM detections
- Operational Discipline: You believe that if a process isn't documented, it doesn't exist. You bring a high standard for SOPs, system configuration docs, and end-user guides to ensure continuity as we scale
- SASE Pillar Expertise: Deep technical proficiency in managing Secure Web Gateways (SWG) and CASB to secure cloud application usage. You are an expert in implementing high-fidelity Data Loss Prevention (DLP) rules and leveraging User and Entity Behavior Analytics (UEBA) to detect anomalous activity and insider threats
- Extreme Ownership: You treat security as a product. You are obsessed with reducing MTTR (Mean Time to Respond) and eliminating false positives through better engineering
- Innovation First: You are dissatisfied with the status quo of "legacy SOCs." You have a proven track record of implementing AI-driven tools and autonomous security operations
- SASE / SSE Platforms: Hands-on expertise in Netskope, Zscaler, or similar platform (specifically SWG/ZIA/ZPA/CASB/DLP/UEBA)
- AI/Automation Platforms: Experience with SOAR (Tines, Torq) and AI/Chatbot integration for SecOps support
- Cloud Infrastructure: Expert-level experience securing AWS, GCP, or Azure
- Detection & Response: Mastery of modern SIEM/XDR (e.g., Panther, Snowflake-based security lakes, or Microsoft Sentinel)
- Offensive Tooling: Proficiency with testing frameworks such as Metasploit, Burp Suite, or Cobalt Strike
- Scripting & Data: Strong proficiency in Python or Go for automation and SQL for querying large datasets
What the job involves
- We are seeking a highly motivated and experienced Security Operations Center (SOC) Manager to lead our internal SOC. We aren’t building a traditional, "stare-at-screens" SOC. As the SOC Manager, you are the architect of our defensive and offensive resilience
- This is a high-impact, hybrid leadership role designed for a "builder" who thrives in the fast-paced environment of a scaling startup. You will lead a sophisticated team that doesn't just monitor alerts but actively engineers a self-healing security ecosystem
- You will bridge the gap between technical execution and strategic risk reduction. Your focus is to integrate AI/ML-enabled detection, hyperautomation, dynamic defensive controls, and continuous offensive testing into a unified operation that scales seamlessly with our business
- Build & Lead the Horizon3 SOC: Establish and scale the core Security Operations Center. You will define functional requirements for all SOC capabilities, ensuring every tool and process is mapped to a formal operational needs statement
- Proactive Threat Intelligence: Lead the Threat Intel function by collecting, analyzing, and disseminating actionable intelligence. You will integrate open-source (OSINT), commercial, and dark web feeds into our SIEM/SOAR to pivot from reactive alerting to proactive threat hunting and adversary tracking
- Incident Response Leadership: Act as the primary lead for incident response actions across the Horizon3 enterprise, ensuring rapid containment and thorough remediation of any security events
- Strategic Capability Mapping: Continuously assess cybersecurity capabilities to identify gaps in coverage and visibility. You will map these gaps to industry frameworks such as—MITRE ATT&CK, NIST CSF, CIS, and SANS Top 20—and provide data-driven recommendations for improvements
- Drive Hyperautomation: Transition the SOC from manual intervention to an automation-first culture. You will design SOAR workflows and leverage AI/ML tools to automate triage, investigation, and remediation
- Operationalize Offensive Security: Oversee internal penetration testing and "Purple Team" exercises. You will use these findings to continuously tune detection logic and preventative controls. You will lead the transition from manual playbooks to AI/ML-driven SOAR workflows that automate triage and response. Manual playbooks will be created and leveraged as needed as well
- Scale the Engine: Build and mentor a high-performing team of detection engineers and analysts. You will define the hiring roadmap and operational processes that allow us to scale 10x without compromising security
- Threat Engineering: Lead the development of custom detection signatures (Sigma, YARA) and proactive threat hunting programs focused on our SaaS infrastructure and CI/CD pipelines
- Strategic Alignment: Translate complex security telemetry into actionable business intelligence. You will manage the budget, vendor relationships, and KPIs that demonstrate systemic risk reduction to executive leadership
- Documentation: Create and maintain comprehensive documentation for SOC processes, SOPs, system configurations, and end-user guides
- Automation and AI: Drive the adoption of automation and AI within IT operations to reduce manual effort, including configuring chatbots for Tier 1 and 2 support, lifecycle management for secure onboarding and offboarding sequences, automating ticket routing, securely provisioning and de-provisioning applications, and implementing predictive system maintenance alerts
- Zero Trust & SASE: Own the management and operational health of our SASE environment. You will leverage these platforms to enforce granular access policies, provide deep SSL inspection, Data Loss Prevention (DLP), and secure our distributed workforce without a "castle-and-moat" perimeter
- Horizon Scanning: Maintain a constant pulse on the industry to identify the latest emerging technologies and evolving threats, ensuring Horizon3 stays ahead of the adversary
- 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
Our take
In an era marked by escalating cyber threats and data breaches, safeguarding digital assets has become a high priority across all industries. Amid this landscape, Horizon3.ai stands out as an autonomous security solution by addressing the critical need for robust cybersecurity.
At the heart of Horizon3.ai's mission is NodeZero™, a platform designed to elevate proactive security measures. Using this, customers can verify their security posture and identify potential vulnerabilities through self-service. This proactive approach to cybersecurity effectively thwarts potential exploits and ensures the integrity of their digital infrastructure.
With 2025 funding in hand, the company is poised to further its ambition to develop into an industry-leading cybersecurity company. The infusion of funds will be channelled towards expanding its partner network, refining its offerings and entering the US government market. Horizon3 aims to establish itself as a pivotal player in the evolving autonomous security landscape, a highly lucrative market valued at $80 billion.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
-8% employee growth in 12 months
Company
Funding (last 2 of 6 rounds)
Jun 2025
$100m
SERIES D
Aug 2023
$40m
SERIES C
Total funding: $187m
Company benefits
- Growth Opportunities: Be part of a dynamic and growing team with numerous career advancement opportunities
- Innovation-Driven Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking
- Flexible Work Environment: Enjoy the convenience and work-life balance that comes with remote work
- Inclusive and Diverse Team: We value diversity and promote an inclusive culture where everyone can thrive
Company HQ
SoMa, San Francisco, CA
Leadership
Snehal Antani
(Co-Founder & CEO)Graduated from the Rensselaer Polytechnic Institute with an MS in Computer Science. Previously worked at IBM as a Lead Architect, at GE Capital as the CIO of Distribution Finance and Splunk as the SVP & GM of Business Analytics & IoT.
Anthony Pillitiere
(Co-Founder)Graduated from the University of Maryland with a Bachelor's Degree in Computer Systems Networking and Telecommunications. Previously worked at the United States Air Force in multiple roles, including Deputy Chief Technology Officer.
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