Information Systems Security Officer (Defense)

TL;DR

Information Systems Security Officer (Defense): Supporting day-to-day security operations for classified information systems with an accent on compliance, continuous monitoring, and vulnerability management. Focus on maintaining system security documentation, enforcing NIST RMF/JSIG standards, and ensuring operational security for cutting-edge defense programs.

Location: Must be based in El Segundo, California, United States (Onsite)

Salary: $140,000 - $160,000

Company

A defense technology company building multi-product portfolios powered by Coherent Distributed Networks to provide domain dominance for warfighters and commercial operators.

What you will do

• Maintain system security documentation including SSPs, CONOPs, and SOPs.
• Ensure system compliance with NIST RMF, ICD 503, JSIG, and DAAPM requirements.
• Execute vulnerability management using ACAS/Nessus and track remediation via POA&Ms.
• Perform audit log reviews, account management, and security event monitoring.
• Review hardware and software change requests for security impact.
• Provide security awareness training and serve as the primary point of contact for user security inquiries.

Requirements

• Active Secret clearance required at time of hire (TS/SCI eligibility preferred).
• IAT Level II or IAM Level II certification (Security+, CySA+, CAP, CASP+, or equivalent).
• 3+ years of experience in information security or IT, with 1–2 years supporting classified U.S. Government systems.
• Hands-on experience with RMF-based authorization (ICD 503, JSIG, or DAAPM).
• Proficiency with ACAS/Nessus, SCAP, and DISA STIGs.
• Experience with Windows Server and/or RHEL/CentOS administration.

Nice to have

• Experience with Special Access Programs (SAPs) or SCI compartmented programs.
• Familiarity with GRC platforms like Xacta or eMASS.
• Knowledge of SIEM platforms (Splunk, ArcSight) in classified environments.
• Exposure to CMMC Level 2/3 requirements.

Culture & Benefits

• 100% company-paid medical, dental, and vision benefits.
• 401k with 50% company match up to 6% of pay.
• Unlimited PTO and 'No meeting Fridays'.
• Free daily lunch and casual dress code.
• Generous pre-IPO stock option grants.