IT Systems Administrator - TS​/SCI Polygraph | Windows, RHEL & RM Security Clearance

Position: IT Systems Administrator - TS/SCI Polygraph | Windows, RHEL & RM with Security Clearance
Check out this new opportunity! IT System Administrator Restricted Ground Systems Scottsdale, AZ Pay Estimated: $63.95 - $68.95/Hour Active Top Secret/SCI with Poly Clearance We are hiring an IT Systems Administrator in Scottsdale, AZ, to support secure Department of Defense (DoD) classified programs. This role requires an active TS/SCI clearance with Polygraph and hands-on experience administering Windows Server, Red Hat Enterprise Linux (RHEL), Risk Management Framework (RMF) activities, ACAS/Nessus vulnerability management, STIG compliance, cybersecurity operations, and secure system administration within classified environments.

Responsibilities:
* Administer and maintain secure Windows and Red Hat Enterprise Linux (RHEL) environments supporting classified DoD programs.
* Support Information System (IS) Risk Management Framework (RMF) activities including system categorization, package preparation, security control implementation, and continuous monitoring.
* Perform weekly system audits, media reviews, and hardware/software configuration management activities.
* Execute monthly vulnerability scans using ACAS/Nessus and coordinate remediation efforts with technical teams.
* Utilize security assessment and hardening tools including SCAP Compliance Checker and STIG Viewer.
* Support Change Control processes, system upgrades, and lifecycle maintenance activities.
* Conduct security testing and evaluation to validate implementation of security controls.
* Assess, track, and mitigate system vulnerabilities throughout the system lifecycle.
* Review and analyze security event and information management (SIEM) data and audit user accounts.
* Perform incident response, containment, and cleanup activities in accordance with customer and company procedures.
* Ensure systems are operated and maintained in compliance with System Security Plans (SSP), security policies, and DoD requirements.
* Support Assured File Transfer (AFT) procedures and secure data handling processes.

Qualifications:

* U.S. Citizenship is required by Federal Law
* Bachelor's degree in Information Technology, Cybersecurity, Computer Science, or related field plus 5+ years of relevant experience; OR Master's degree plus 3+ years of relevant experience.
* Active Department of Defense TS/SCI clearance with Polygraph at time of hire.
* Hands-on experience administering Red Hat Enterprise Linux (RHEL) and Windows environments.
* Experience with vulnerability assessment and system hardening tools including:
* ACAS / Nessus
* SCAP Compliance Checker
* STIG Viewer
* Understanding of Security Technical Implementation Guides (STIGs) and vulnerability remediation processes.
* Experience supporting RMF, continuous monitoring, and Information Assurance (IA) activities.
* Ability to install, configure, secure, and maintain servers in classified environments.
* Experience executing configuration management and audit review activities.
* Ability to work independently with minimal supervision.
* DoD 8570 IAM Level I certification preferred (Security+ CE, CAP, GSLC, etc.).
* Ability to support on-site classified program work in Scottsdale, AZ.

Preferred Qualifications:

* Prior experience supporting classified DoD or Intelligence Community environments.
* Experience with SIEM review and security event analysis.
* Knowledge of incident response procedures within secure environments.
* Experience identifying automation or AI-driven improvements for cybersecurity operations. Moseley Technical Services, Inc. is an AA/EEO/Veterans/Disabled Employer What to Expect
* Applicants selected for employment will be required to pass a pre-employment drug screening and background investigation, which may include education, criminal, and work history verifications.
* Accepted applicants will be eligible for benefits, including medical and supplemental insurance, and a 401(k) plan. Appreciation and gratitude for employees are hallmarks of organizations with low turnover.
* Final position level and pay will be based on experience. Resources
* To apply, send a resume to:  
* For more active job openings:
Search Jobs
* For more information about Moseley, visit:
About Us Moseley Technical Services, Inc. (Moseley) was incorporated in 1994 to provide engineering and professional services to the aerospace/defense, manufacturing, government, and commercial industries. Our Mission is to deliver superior service to our customers and employees. We have been successful in our vision by building long-term relationships with customers and employees through integrity, transparency, and appreciation. We stand by our 30-year-old commitment of "World Class Service.

World Class Company."