Apex Space
Information Systems Security Officer (ISSO)
$104K–$143K
Los Angeles · Full-time · Posted Sep 15, 2026
- Experience
- 3 or more years in an ISSO, security compliance analyst, security engineer, system administrator with security responsibilities, or a similar role.
- Visa sponsorship
- Active TS/SCI clearance and U.S. citizenship required. For ITAR eligibility, applicants must qualify as a U.S. Person or be able to obtain required U.S. export authorizations.
About the job
Keeps assigned systems secure, documented, and review-ready, focusing on NIST SP 800-171 and CMMC Level 2 while supporting other compliance and authorization activities.
What you'll do
- Maintain security plans, inventories, policies, procedures, and evidence for the CUI environment; track implementation at the artifact level.
- Support ATO and RMF documentation, including POA&Ms, and validate evidence from security platforms.
- Lead vulnerability and configuration remediation and security reviews with system owners and other teams.
What they ask for
- Active TS/SCI clearance and U.S. citizenship required.
- At least 3 years in an ISSO, security compliance analyst, security engineer, system administrator with security responsibilities, or similar role.
- Strong working knowledge of NIST SP 800-171, CMMC Level 2, POA&M management, control evidence, and assessment preparation.
- Experience maintaining an SSP or equivalent security documentation and supporting formal security reviews.
Nice to have
- Experience with ATO, RMF, NIST SP 800-53, SOC 2 Type II, ISO 27001, DFARS 252.204-7012, SPRS, STIGs, or classified systems.
- Experience with Microsoft GCC High, CrowdStrike, Palo Alto, Tenable, AWS GovCloud, Entra ID, or similar platforms; security certification such as Security+, CGRC, or CISSP.
Pay
$104K – $143K (base salary)
Tools
NIST SP 800-171, CMMC Level 2, CrowdStrike, Palo Alto, Tenable, Jira, Microsoft GCC High, AWS GovCloud
Model-written summary · the original posting is authoritative