Castelion
Information System Security Officer (ISSO)
Torrance, CA +1 · Full-time · Posted Sep 7, 2026
- Location
- Torrance, CA
19951 Mariner Ave, Torance, CA 90503 - Experience
- 1+ years in cyber assurance; alternatively, 3+ years managing cyber assurance for classified computer systems/networks may substitute for the degree requirement.
- Education
- Bachelor’s degree, or 3+ years of experience managing cyber assurance for classified computer systems/networks in lieu of a degree.
- Visa sponsorship
- The position requires access to export-controlled information; employment is contingent on being able to access applicable information without additional export licensing. The posting also states that required government clearance or authorization and applicable citizenship or other eligibility requirements may apply.
About the job
Supports the ISSM in managing Castelion’s classified cyber assurance program, ensuring systems meet regulatory, contractual, and customer requirements.
What you'll do
- Assist with RMF A&A lifecycle activities, compliance, audits, assessments, and tests for classified systems.
- Implement new requirements and maintain system records, policies, logs, user briefings, and agreements.
- Coordinate with internal, government, customer, supplier, and contractual stakeholders; evaluate tools to improve assurance operations.
What they ask for
- Bachelor’s degree, or 3+ years managing cyber assurance for classified computer systems/networks in lieu of a degree.
- 1+ years of experience in cyber assurance.
- Active Top Secret clearance with SCI eligibility.
- DoD IAM Level III eligibility based on active certifications; CI-scope polygraph or ability to successfully complete.
Nice to have
- Demonstrated experience with NRO A&A and JSIG A&A processes; subject matter expertise in the RMF 7 step process.
- Experience obtaining ATOs for networks, weapon systems, and satellite systems; demonstrated COMSEC experience.
Tools
Nessus, Splunk, Security Center, Service Now (SNOW), eMASS
Model-written summary · the original posting is authoritative