Senior Cybersecurity Architect — Zero-Trust & Compliance

Castelion Corporation; Torrance (CA); Vor Ort; USD 150.000 - 210.000; Vollzeit

Zusammenfassung

Castelion Corporation seeks a Senior Cybersecurity Architect to lead design and implementation of secure, compliant information security programs. You will translate mission and regulatory requirements into end-to-end solutions, coordinate with IT, software, and engineering, and advance our security posture across local and remote sites.

The role emphasizes hands-on security engineering, threat modeling, and documentation, with opportunities to influence policy, automation, and workflows in a

Qualifikationen

• 7-10+ years of hands-on experience in cybersecurity engineering, infrastructure security, or related fields.
• Strong technical background in network security, endpoint protection, access control, and vulnerability management.
• Proficiency with modern security tools such as CrowdStrike, Palo Alto, Nessus, Splunk and Snort.
• Experience with incident response, malware analysis, and penetration testing.
• Deep understanding of cloud security (AWS, Azure, or GCP).
• Familiarity with security principles and frameworks (NIST 800-171, CMMC, ISO 27001).
• Eligibility to keep and maintain a U.S. security clearance.

Aufgaben

• Define and implement security architectures aligned with Zero Trust, defense-in-depth, and least-privilege models.
• Develop security reference architectures, patterns, and standards for enterprise and program-level systems.
• Ensure cybersecurity is embedded across the full system lifecycle (requirements, design, development, test, deployment, sustainment).
• Design, implement, and maintain cybersecurity tools and systems (firewalls, EDR, IDS/IPS, SIEM, vulnerability scanners).
• Conduct threat modeling, security risk assessments, and vulnerability analyses.
• Monitor security events, investigate suspicious activity, and respond to incidents with urgency and precision.
• Develop and maintain System Security Plans (SSPs), POA&Ms, and supporting documentation for audits and assessments.
• Partner with IT, engineering, DevSecOps, and Program Security to integrate security into infrastructure and application design.
• Manage security patching cycles and lead remediation based on risk assessments.
• Support audit, compliance, and risk management activities (NIST, CMMC, others) and manage supply chain cybersecurity concerns.
• Conduct regular internal audits and readiness checks for external audits/DoD reviews.
• Serve as on-site cybersecurity expert for Torrance HQ and travel 5-10% to TX/NM.

Kenntnisse

Cybersecurity engineering

Infrastructure security

Network security

Endpoint protection

Vulnerability management

Incident response

Penetration testing

Cloud security

MITRE ATT&CK

Security frameworks

Tools

CrowdStrike

Palo Alto

Nessus

Splunk

Snort

Jobbeschreibung

Castelion Corporation seeks a Senior Cybersecurity Architect to lead design and implementation of secure, compliant information security programs. You will translate mission and regulatory requirements into end-to-end solutions, coordinate with IT, software, and engineering, and advance our security posture across local and remote sites.

The role emphasizes hands-on security engineering, threat modeling, and documentation, with opportunities to influence policy, automation, and workflows in a