Sr. System Administrator / TS/SCI / Onsite: CO
25037.5010
Apply to this job ENTERPRISE BUSINESS SERVICES Until 9/4/2026 3+ years exp First posted July 6, 2026 Last posted July 6, 2026
Job description
• Active TS/SCI clearance with ability to obtain CI Poly
• U.S. Citizenship required for access to the work facility
• Must have a DoD 8572 qualified certification such as CompTIA Security+
• 3+ years of experience administering Linux and Windows server environments
• Demonstrated experience effectively performing in a fast paced, dynamic environment
• Experience with DISA STIGs and Security Hardening of OS and applications
• Experience performing diagnostics and troubleshooting network issues
• Experience with Operating Systems life cycle management and configuration management (i.e., Installation/Upgrades, System Imaging, Account Management, Print Services, integration with Domain Services, Hardware Modernization, Performance Monitoring, etc.)
• Experience with vulnerability remediation and security management (i.e., system hardening, log management, configuration management (i.e., Nessus, Trellix, Splunk, ACAS, SCAP, etc.))
• Strong communication skills and ability to work effectively in a team environment
• Ability and willingness to accommodate occasional off-shift hours
• U.S. Citizenship required for access to the work facility
• Must have a DoD 8572 qualified certification such as CompTIA Security+
• 3+ years of experience administering Linux and Windows server environments
• Demonstrated experience effectively performing in a fast paced, dynamic environment
• Experience with DISA STIGs and Security Hardening of OS and applications
• Experience performing diagnostics and troubleshooting network issues
• Experience with Operating Systems life cycle management and configuration management (i.e., Installation/Upgrades, System Imaging, Account Management, Print Services, integration with Domain Services, Hardware Modernization, Performance Monitoring, etc.)
• Experience with vulnerability remediation and security management (i.e., system hardening, log management, configuration management (i.e., Nessus, Trellix, Splunk, ACAS, SCAP, etc.))
• Strong communication skills and ability to work effectively in a team environment
• Ability and willingness to accommodate occasional off-shift hours
About this role
Summary
Manage Linux/Windows servers, security hardening, troubleshooting, and system lifecycle.
Job title
Sr. System Administrator
Experience level
3+ years
Minimum experience
3+ years exp
Industry
defense
Location requirements
onsite in Colorado, US citizenship required, security clearance needed
Salary
Not specified
Management role
No
Skills & keywords
Required skills
security+disas stigsnetwork troubleshootingsystem hardeningsystem lifecycle management
Preferred skills
None specified
Specializations
LinuxWindowssecurity hardeningnetwork troubleshootingsystem configuration
Locations
Structured locations inferred from the posting.
Colorado Springs, CO, USA
On-site City