USAF - Sr. System Administrator

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

Job summary

cFocus Software Incorporated seeks a Sr. System Administrator to join our program supporting the United States Air Force. This onsite role is based at Ellsworth AFB, SD and requires a TS/SCI SSBI clearance.

The position involves Windows and Linux administration in high-availability environments, AD engineering, and DoD cybersecurity compliance. You will collaborate across teams and provide Level III support to ensure mission readiness.

Qualifications

• Active TS/SCI SSBI clearance required.
• 10+ years of systems administrator experience.
• Experience administering enterprise Windows and Linux in high-availability environments.
• DoD 8570 IAT Level II and DoD 8140 451-Intermediate certifications required.

Responsibilities

• Perform senior-level Windows and Linux systems administration for FMWF infrastructure and mission environments.
• Engineer and troubleshoot Active Directory, service accounts, permissions, and authentication dependencies.
• Monitor system health, perform capacity planning, and implement corrective actions.

Skills

TS/SCI clearance

Windows systems administration

Linux systems administration

Active Directory engineering

Nutanix virtualization

Disaster recovery planning

RMF compliance

Education

B.S. Computer Science / Information Technology / related field

Tools

Nutanix

Job description

cFocus Software seeks a Sr. System Administrator to join our program supporting the United States Air Force. This position is onsite with the onsite location being in Ellsworth, South Dakota. This position requires a TS/SCI SSBI clearance.

Qualifications

• Active TS/SCI SSBI clearance
• B.S. Computer Science, Information Technology, or a related field
• 10+ years of Systems Administrator experience
• Advanced experience administering and engineering enterprise Windows and Linux systems in a high-availability, mission-critical environment.
• Demonstrated experience with Active Directory engineering, service-account configuration, identity and access dependencies, and privileged administrative operations.
• Experience with enterprise virtualization, infrastructure capacity planning, performance analysis, system monitoring, and root cause engineering; Nutanix experience is strongly aligned to the PWS.
• Hands-on experience with configuration management, system baselines, change control, patch engineering, vulnerability remediation, and deployment validation.
• Experience validating patches, updates, system modifications, and enhancements in controlled development/test environments before production release.
• Experience with backup, recovery, resilience, COOP, disaster recovery, and emergency corrective maintenance for mission-essential systems.
• Ability to provide senior/Level III support involving advanced diagnostics, log analysis, debugging, fault isolation, and sustainable corrective action.
• Working knowledge of RMF, Assessment and Authorization, security control implementation, continuous monitoring, and DoD/Air Force cybersecurity compliance.
• Ability to collaborate across infrastructure, database, middleware, application, cybersecurity, and program-management teams and communicate technical findings to Government stakeholders.
• Ability to work primarily at Ellsworth AFB during the PWS duty-hour window and support rare work at Wright-Patterson AFB or a contractor facility when required.
• Active DoD 8570 IAT Level II & DoD 8140 System Administrator 451-Intermediate certifications required

Duties

• Perform senior-level Windows and Linux systems administration for FMWF infrastructure and associated mission environments.
• Engineer, configure, administer, and troubleshoot Active Directory, service accounts, authentication dependencies, permissions, and related enterprise services.
• Perform infrastructure performance analysis, capacity planning, root cause engineering, and enterprise virtualization engineering in Nutanix environments.
• Monitor system health and availability; analyze performance degradation and implement sustainable corrective engineering actions.
• Manage configuration baselines and technical baseline control for infrastructure components, development assets, system settings, and administrative documentation.
• Engineer, test, validate, and deploy enterprise patches, updates, and security directives, including IAVAs, TCNOs, and NOTAMs, within prescribed timelines.
• Conduct vulnerability remediation and validate that corrective actions do not compromise availability, functionality, security controls, or configuration integrity.
• Analyze proposed system modifications, implement approved technical changes, and validate post-deployment performance and production readiness.
• Maintain controlled engineering, development, and test environments, including configuration management, patch validation, and test data support.
• Provide data-protection, backup, restoration, recovery, and resilience support; help ensure secure backup and appropriate off-site storage of development data.
• Support continuity-of-operations (COOP), disaster recovery, routine sustainment, emergency maintenance, and recovery activities requested by the PMO.
• Provide Level III technical escalation support using advanced diagnostics, log analysis, debugging, fault isolation, and root cause analysis.
• Coordinate technical activities with database administrators, DB2 engineers, WebSphere/middleware personnel, cybersecurity staff, developers, CyberArk administrators, and Government stakeholders.
• Support cross-stack integration among infrastructure, DB2 databases, WebSphere middleware, Active Directory, virtualization, and security tooling.
• Implement and sustain applicable security controls and provide technical evidence supporting RMF, Assessment and Authorization, continuous monitoring, and compliance activities.
• Maintain accurate, version-controlled system documentation, engineering records, configuration data, test results, incident records, procedures, and status reports.
• Comply with Government change management, technical review, readiness review, quality control, QASP, installation security, and access-control requirements.