CareerPlan

Information System Security Officer

Costa Mesa, CA (OC-00)Full-time$124k–$164k2026-10-31 → 2026-11-11
Security clearance required

Core

Hands-on security practitioner responsible for day-to-day compliance execution, vulnerability management, and maintaining authorization portfolios for classified, closed, or air-gapped environments.

Role type

Senior Information System Security Officer (ISSO)

Builds

Compliance evidence and security controls for defense technology systems

Domain

Defense / Cybersecurity / Classified Infrastructure

Required skills

NIST RMF, JSIG, STIGs, vulnerability management, access controls, encryption strategies, incident response, risk assessments, audits, continuous monitoring, System Security Plans (SSP), POA&Ms, Authority to Operate (ATO)

Preferred skills

Splunk, DISA STIGs, SCC, Python, Powershell, Bash, Linux Red Hat, SELinux

Technologies

Splunk, DISA STIGs, SCC, Python, Powershell, Bash, Linux Red Hat, SELinux

Responsibilities

Run security scans and validate STIGs; manage access controls and encryption; investigate security events; maintain compliance evidence; tailor NIST 800-53 controls; conduct security risk assessments and audits; participate in Authorization and Accreditation (A&A) processes; lead incident response efforts; collaborate with government security officials.

Seniority

Senior, hands-on IC