Senior Cybersecurity Analyst

Castelion Corporation

$100K — $130K *
Aerospace & Defense
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • 3+ years of experience in cybersecurity or technical security roles
  • Hands-on experience with security operations and incident response
  • Expert knowledge of security tools like SIEM and EDR
  • Deep knowledge of MITRE ATT&CK framework
  • Experience protecting Controlled Unclassified Information (CUI)
  • Ability to obtain and maintain a U.S. security clearance

Responsibilities

  • Lead security monitoring using SIEM platforms and threat detection tools
  • Analyze security events and coordinate incident response activities
  • Identify vulnerabilities and recommend remediation strategies
  • Conduct threat hunting to proactively identify adversaries
  • Perform forensic analysis of security incidents involving sensitive systems
  • Contribute to compliance with key DoD requirements
  • Mentor junior analysts and support their skill development

Benefits

  • Meaningful long-term equity for employees
  • Four weeks of paid time off and ten paid holidays
  • Comprehensive health benefits with 100% employee-covered medical
  • Paid parental leave and a fitness stipend for health promotion
  • Onsite amenities like EV charging and catered meals
Full Job Description
About the job Senior Cybersecurity Analyst

Senior Cybersecurity Analyst

We are seeking an experienced Senior Cybersecurity Analyst to join our team. This role will be responsible for protecting sensitive systems, data, and infrastructure critical to national security. The ideal candidate will have expertise in threat detection, SOC operations, incident response, and compliance frameworks specific to the defense industrial base.

Responsibilities
  • 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
  • Configure and maintain security tools including IDS/IPS, EDR, DLP, and vulnerability scanners
  • Support secure architecture reviews across the organization
  • Mentor junior analysts and contribute to team skill development
  • Coordinate with IT, engineering, manufacturing, and program teams on security initiatives
  • Participate in threat intelligence sharing with government and industry partners

Basic Qualifications
  • 3+ years of experience in cybersecurity, information security, or related technical security roles
  • Hands-on experience with 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
  • Familiarity with threat intelligence platforms and OSINT techniques
  • Experience protecting Controlled Unclassified Information (CUI)
  • Experience operating within aerospace, defense, national security, government contracting, or highly regulated technical environments
  • Strong understanding of network protocols, operating systems (Windows, Linux), and cloud environments
  • Experience as a member of incident response protocols, vulnerability management, and security operations functions
  • Proficiency in scripting/automation
  • U.S. Person status required to comply with ITAR regulations
  • Ability to obtain and maintain a U.S. security clearance

Preferred Skills and Experience
  • Experience supporting defense manufacturing or operational technology (OT/ICS) environments
  • Experience securing embedded systems, avionics, autonomous systems, or weapon systems
  • Experience at high-growth startups or scaling organizations
  • Hands-on experience implementing SIEM and SOAR operations
  • Experience with CMMC 2.0, NIST SP 800-171, DFARS 252.204-7012/7020/7021, ITAR, and related defense compliance requirements
  • Industry certifications such as Security+, CEH, CISA, GIAC, or equivalent
  • Degree in Cybersecurity, Computer Science, Engineering, or related field

Additional Requirements
  • Ability 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

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 for this job. Duties, responsibilities and activities may change at any time with or without notice.

Benefits and Perks

All full-time employees are granted meaningful long-term equity, sharing in the company's significant growth trajectory. We offer four (4) weeks of paid time off, ten (10) company-paid holidays, and comprehensive health benefits - including 100% employee-covered medical and strong dependent coverage, along with dental and vision plans. We also provide paid parental leave to support growing families, a $100 monthly fitness stipend to promote health and performance, and onsite EV charging for convenience. In addition, employees enjoy perks like catered meals, company-covered food during high-demand periods, and a fully stocked kitchen to stay fueled throughout the day.

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