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# Systems Administrator (RMF)

- **Company:** TEKSYSTEMS INC.
- **Location:** Palmdale, CA, United States
- **Contract:** Permanent contract
- **Skills:** Microsoft Access, Microsoft Windows, Active Directory, Cyber Security, System Configuration, Linux, Information Security Management, Linux System Administration, Windows Servers, Red Hat Enterprise Linux, SAP (Applications), Security Content Automation Protocol, Trusted Systems, Software Vulnerability Management, Patch Management, Nessus, Security Orchestration, Automation & Response, Vulnerability Analysis
- **Published:** November 3, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9284245/systems-administrator-rmf

## About the Role

Active Top Secret (TS) Security Clearance.
Security+ certification (or equivalent DoD 8570-compliant certification).
Strong experience supporting and administering systems under the Risk Management Framework (RMF).
Demonstrated experience implementing and maintaining JSIG compliance requirements within classified environments.
Experience administering and securing both Windows and Linux operating systems.
Comprehensive understanding of:
NIST 800-53 Security Controls
STIG implementation and compliance
Vulnerability management processes
Security remediation and mitigation planning
Continuous monitoring methodologies
Endpoint security technologies
Experience supporting accreditation and ATO processes.
Strong troubleshooting and problem-solving abilities.
Excellent written and verbal communication skills.
Preferred Qualifications
Previous experience supporting Special Access Programs (SAP) or highly classified government environments.
Hands-on experience with:
Ivanti
Trellix
ACAS/Nessus
HBSS/ePO environments
Microsoft Active Directory
Windows Server administration
Red Hat Enterprise Linux (RHEL)
Experience with security automation, compliance reporting, and enterprise vulnerability remediation programs.
Familiarity with cybersecurity engineering and secure systems architecture principles.

## Description

We are seeking an experienced RMF Administrator to support a highly secure Department of Defense environment in Palmdale, CA. The ideal candidate will possess extensive experience implementing and maintaining the Risk Management Framework (RMF) and Joint Special Access Program (SAP) Implementation Guide (JSIG) requirements across both Windows and Linux operating systems.

This role will be responsible for ensuring cybersecurity compliance, vulnerability remediation, patch management, endpoint security, and continuous monitoring activities within classified environments. The successful candidate will work closely with Information System Security Managers (ISSMs), cybersecurity teams, system administrators, and program stakeholders to maintain accreditation requirements and strengthen overall security posture., Support and maintain RMF compliance activities throughout the system lifecycle.
Implement and manage cybersecurity controls in accordance with NIST 800-53, RMF, and JSIG requirements.
Perform vulnerability assessments, security remediation, and continuous monitoring activities.
Manage and coordinate system patching activities across Windows and Linux environments.
Analyze security scan results and develop mitigation strategies for identified vulnerabilities.
Ensure timely remediation of findings from ACAS, SCAP, STIGs, and other security assessment tools.
Maintain system security documentation, artifacts, and accreditation packages.
Assist with Authority to Operate (ATO) sustainment activities and security audits.
Support endpoint security initiatives, including deployment, maintenance, and monitoring of security tools.
Collaborate with engineering and infrastructure teams to ensure secure system configurations and compliance requirements are met.
Review and validate security controls, configurations, and technical implementations.
Participate in security risk assessments and support cybersecurity inspections.
Provide technical guidance regarding RMF implementation and cybersecurity best practices.