Senior System Administrator - Onsite, Ellsworth AFB (TS/SCI)

cFocus Software Incorporated; Box Elder (SD); On-site; USD 120,000 - 160,000; Full time

Job summary

cFocus Software Incorporated is seeking a Sr. System Administrator to join our Air Force program. The role is onsite at Ellsworth AFB, SD and requires TS/SCI SSBI clearance.

You will administer Windows and Linux systems, manage Active Directory, and coordinate with cross-functional teams to ensure secure, resilient operations. Responsibilities include patch validation, vulnerability remediation, RMF compliance, and incident response.

Qualifications

• Active TS/SCI SSBI clearance required.
• B.S. in CS / IT or related field.
• 2+ years of Systems Administrator experience.
• Advanced Windows and Linux administration in high-availability environments.
• Experience with Active Directory engineering, IAM and privileged operations.
• Nutanix virtualization experience is strongly aligned.
• Patch management, baseline control, and vulnerability remediation.
• RMF, A&A, continuous monitoring, and DoD cybersecurity compliance knowledge.
• Ability to coordinate with multiple teams and Government stakeholders.

Responsibilities

• Perform senior-level Windows and Linux administration for mission environments.
• Engineer and troubleshoot Active Directory, service accounts, and permissions.
• Analyze performance, plan capacity, and perform virtualization engineering in Nutanix.
• Monitor health, identify degradation, and implement corrective actions.
• Maintain baselines, configuration data, and engineering documentation.
• Patch, validate, and deploy security directives within timelines.
• Conduct vulnerability remediation without compromising availability.
• Analyze changes, validate production readiness, and support test environments.
• Provide data protection, backup, and disaster recovery support.
• Coordinate with DB2, WebSphere, CyberArk, cybersecurity staff and stakeholders.

Skills

Windows administration

Linux administration

Active Directory engineering

Identity and access management

System monitoring

High-availability environments

Tier III support

Education

B.S. Computer Science / Information Technology

Tools

Nutanix

WebSphere

DB2

CyberArk

Job description

cFocus Software Incorporated is seeking a Sr. System Administrator to join our Air Force program. The role is onsite at Ellsworth AFB, SD and requires TS/SCI SSBI clearance.

You will administer Windows and Linux systems, manage Active Directory, and coordinate with cross-functional teams to ensure secure, resilient operations. Responsibilities include patch validation, vulnerability remediation, RMF compliance, and incident response.