Hiring: Senior Cybersecurity Analyst Company: Castelion Location: Torrance, CA Job Posted Time: 2026-09-15 13:22:44 Employment Type: Full-time Target Skills & Keywords : Embedded Systems, Linux, SIEM, SOC, Security Clearance, Splunk About the job Experience: •Hands-on experience implementing SIEM and SOAR operations Required Skills: •Lead 24/7 security monitoring efforts using SIEM platforms and advanced threat detection tools •Analyze security events, identify potential threats, and coordinate incident response activities •Identify vulnerabilities and recommend remediation strategies for complex environments •Analyze malware, APT tactics, and threat actor behavior •Perform threat hunting activities to proactively identify sophisticated adversaries •Conduct forensic analysis of security incidents involving classified and sensitive systems •Contribute to compliance with NIST 800-171, CMMC, DFARS, ITAR, and other DoD requirements •Contribute to and/or maintain security documentation including internal documentation, policies and procedures, incident reports, and audit artifacts Qualifications: •3+ years of experience in cybersecurity, information security, or related technical security roles •Applied hands-on capability in security operations, incident response, and threat analysis •Expert knowledge of security tools: SIEM (Splunk, QRadar, Sentinel), EDR (CrowdStrike, Carbon Black), IDS/IPS •Deep knowledge of MITRE ATT&CK framework and adversary tactics, techniques, and procedures •Operational familiarity with threat intelligence platforms and OSINT techniques •In-depth knowledge of network protocols, operating systems (Windows, Linux), and cloud environments •U.S. Person status required to comply with ITAR regulations •Demonstrated capacity to obtain and maintain a U.S. security clearance •Demonstrated capacity to put in extended hours, including evenings and weekends, when required to meet aggressive timelines •This role is based in Torrance, CA and requires full-time onsite presence Compensation: •All full-time employees are granted meaningful long-term equity, sharing in the company's significant growth trajectory Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!