Senior System Administator - TS/SCI Clearance

What You Will Do 

• Administer, maintain, and troubleshoot Windows Server and Windows desktop environments across classified or secure enterprise networks. 

• Manage Active Directory, Group Policy Objects, DNS, DHCP, user accounts, security groups, organizational units, and domain controller operations. 

• Perform system monitoring, performance tuning, capacity planning, patch management, vulnerability remediation, and root cause analysis. 

• Install, configure, upgrade, and support operating systems, enterprise applications, server hardware, and virtualized infrastructure. 

• Develop, maintain, and execute standard operating procedures for system builds, configuration baselines, software deployments, and maintenance activities. 

• Support compliance with applicable security standards, including DISA STIGs, vulnerability scan remediation, change control, and configuration management requirements. 

• Provide Tier II/III support for escalated incidents involving servers, workstations, applications, authentication, permissions, and enterprise services. 

• Use PowerShell or other scripting tools to automate routine administration, reporting, software deployment, and maintenance tasks. 

• Coordinate with cybersecurity, network, engineering, and help desk teams to support secure and reliable system operations. 

• Mentor junior administrators and provide technical guidance on troubleshooting, documentation, and operational best practices. 

What We Expect of You 

• Active TS/SCI clearance is required at the time of hire. 

• U.S. citizenship is required due to federal contract and clearance requirements. 

• 8+ years of relevant experience in systems administration, infrastructure operations, or enterprise IT support. 

• Strong hands-on experience administering Microsoft Windows Server and Windows workstation environments. 

• Experience with Active Directory, Group Policy, DNS, DHCP, domain services, user permissions, and enterprise authentication. 

• Experience with patching, vulnerability remediation, system hardening, and applying secure configuration baselines. 

• Ability to troubleshoot complex hardware, software, operating system, authentication, and network-related issues. 

• Experience supporting secure or classified environments, including adherence to change management and documentation requirements. 

• Strong written and verbal communication skills, with the ability to document procedures and brief technical status to stakeholders. 

• DoD 8570/8140 IAT Level II certification, such as Security+ CE, or the ability to obtain/maintain required compliance certification, is a plus. 

• Experience with VMware, Hyper-V, Nutanix, or other enterprise virtualization platforms, is a plus. 

• Experience with Microsoft Endpoint Configuration Manager, SCCM, MECM, PDQ Deploy, or similar software deployment tools, is a plus. 

• Familiarity with ACAS/Nessus vulnerability findings, HBSS/ESS tools, STIG Viewer, and remediation tracking, is a plus. 

• Experience creating or maintaining Windows images, deployment packages, and automated build processes, is a plus. 

• Working knowledge of backup and recovery processes, disaster recovery planning, and continuity of operations support, is a plus. 

• Experience supporting IIS, file services, print services, certificate services, or other Microsoft enterprise services, is a plus. 
  
  Pay range: $175,000 - $220,000 depending on experience and skill set 
  Benefits overview: https://cdw.benefit-info.com/ 
  Salary ranges may be subject to geographic differentials