Senior ISSO III | RMF & Cyber Defense Specialist

ORBIS Inc.; Corona (CA); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Excellent benefits package

Job summary

ORBIS Inc. seeks an ISSO III to manage day-to-day security controls across assigned systems under the NSWC Corona CCAM contract. You will implement RMF and continuous monitoring, coordinate with engineers and admins, assess vulnerabilities with ACAS/Nessus, and maintain artifacts in eMASS.

You will draft RMF documentation, support incident response, and ensure least-privilege access while working in a fast-paced environment with deadlines.

Qualifications

• Bachelor's degree in Information Technology, Cybersecurity, Computer Science or related field (significant experience may substitute).
• Active TS/SCI clearance and U.S. citizenship required.
• Minimum 6 years coordinating and implementing security changes, vulnerability analysis, and continuous monitoring.

Responsibilities

• Implement, monitor, and maintain security controls across information systems.
• Lead vulnerability assessments using ACAS/Nessus and analyze results to identify critical flaws.
• Apply STIGs with SCC and STIG Viewer reviews.
• Assemble artifacts in eMASS to demonstrate NIST 800-53 controls.
• Draft RMF documentation: ISCP, IRP, inventories.
• Support POA&M creation and remediation steps.
• Review SIEM alerts, logs, and firewall traffic daily for anomalies.
• Enforce least-privilege access and manage account configurations.
• Assist in cyber incident response and root-cause analysis.
• Monitor IAVAs and ensure timely patch deployment.
• Participate in CCBs for security impact of changes.
• Conduct physical security walkthroughs of facilities housing sensitive systems.
• Assist in formal command cyber inspections and validation events.

Skills

Vulnerability analysis

RMF lifecycle

Continuous monitoring

Windows security configurations

Linux/Red Hat security

AD group policies

Scripting (PowerShell)

Scripting (Python)

Scripting (Bash)

Security operations

Education

Bachelor's degree in Information Technology/Cybersecurity/Computer Science

Tools

ACAS (Tenable/Nessus)

HBSS (Trellix/McAfee)

Splunk (SIEM)

STIG Viewer

SCAP Compliance Checker

eMASS

Job description

ORBIS Inc. seeks an ISSO III to manage day-to-day security controls across assigned systems under the NSWC Corona CCAM contract. You will implement RMF and continuous monitoring, coordinate with engineers and admins, assess vulnerabilities with ACAS/Nessus, and maintain artifacts in eMASS.

You will draft RMF documentation, support incident response, and ensure least-privilege access while working in a fast-paced environment with deadlines.