Senior Systems Administrator – Top Secret Clearance w/SCI Eligibility

AMERICAN SYSTEMS

. Provide Tier II systems administration and operational support for a secure enterprise environment .

Posted 10/22/2026full-timeChantilly • Virginia • United StatesSenior💰 $130,000 - $150,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in systems administration and operational support within secure enterprise environments, with a strong focus on monitoring, troubleshooting, and resolving system performance and security issues. Proficient in managing VMware, Microsoft Windows environments, and implementing ITIL best practices.

Highest-signal resume keywords

Active Top Secret ClearanceDoD 8140 IAT Level II CertificationSystems Administration ExperienceVMware vCenter AdministrationMicrosoft Windows Support

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Systems AdministrationTroubleshootingConfiguration ManagementBackup and RecoveryEndpoint ProtectionActive DirectoryDNSDHCPTCP/IPSecurity Hardening

Soft Skills

Technical GuidanceCollaborationDocumentation

Tools & Technologies

VMware vCenterHorizon ViewSolarWindsCisco Catalyst CenterHP SANsMicrosoft Certificate ServicesPKIGroup PolicySystems-Management ToolsTACLANE Encryption Devices

Certifications & Qualifications

DoD 8140 IAT Level II CertificationSecurity+ CEMCSAVCP

Industry Keywords

ITILIncident ManagementProblem ManagementChange ManagementEnterprise Environment

Tech Stack

Tools & technologies

Cyber SecurityDNSTCP/IPVMware

About the role

Key responsibilities & impact

Provide Tier II systems administration and operational support for a secure enterprise environment
Monitor, troubleshoot, and resolve system availability, performance, security, and configuration issues
Administer VMware vCenter, Horizon View, Site Recovery Manager, SolarWinds, Cisco Catalyst Center (DNAC), GEMOne, HP SANs, enterprise storage, Microsoft Certificate Services, PKI, Active Directory, Group Policy, DNS, DHCP, Windows systems, backup, recovery, endpoint protection, and systems-management tools
Maintain the health, performance, and availability of multi-user systems
Partner with network, cybersecurity, engineering, service desk, and customer teams to resolve operational issues
Analyze requirements and support integration, configuration, and sustainment of supported platforms
Participate in ITIL incident, problem, and change management activities
Prepare, document, and execute approved change requests
Develop and maintain SOPs, knowledge articles, and technical documentation
Support testing, packaging, release preparation, and production integration
Apply security requirements, hardening guidance, and operational best practices
Provide technical guidance to junior Systems Administrators and Systems Engineers
Participate in shift turnover and document incidents, actions taken, and outstanding risks

Requirements

What you’ll need

Active Top Secret clearance with SCI eligibility
Bachelor’s degree and 5+ years of systems support or administration experience, or Associate’s degree and 7+ years of relevant experience, or high school diploma and 11+ years of relevant experience
Current DoD 8140 IAT Level II certification, such as Security+ CE
Ability to obtain a DoD 8140 computing-environment certification within 6 months of hire, such as MCSA, VCP, or equivalent
Experience supporting Microsoft Windows environments, including Windows Server 2008–2022, Windows 10/11, Exchange, Active Directory, DNS, Group Policy, PKI, workstation/server hardware, backup, antivirus, DHCP, and TCP/IP
Working knowledge of VMware and Cisco systems, including vSphere or Horizon View, Cisco networking devices, and TACLANE encryption devices

Benefits

Comp & perks

Healthcare benefits
Paid leave
Retirement plans
Insurance programs
Education and training assistance
100% employee-owned company