Senior System Administrator

What You'll Do (Key Responsibilities)

• Administer, maintain, and troubleshoot enterprise Windows Server and Linux/Unix systems.
• Manage core infrastructure services including Active Directory, Group Policy, DHCP, DNS-related support, and endpoint/server configuration tools.
• Support virtualization environments, including VMware vSphere or similar platforms.
• Perform system patching, hardening, vulnerability remediation, and configuration management for EUDs and Servers.
• Develop and maintain scripts using PowerShell, Python, or similar languages to automate administrative tasks.
• Support server hardware lifecycle activities, including rack installation, blade/server replacement, component upgrades, disk replacement, RAM upgrades, PCIe card installation, and related maintenance.
• Troubleshoot infrastructure issues across servers, storage, networking, applications, and authentication services.
• Provide escalated end-user support for complex issues, serving as the next level of support for Junior System Administrators / support staff.
• Use ServiceNow or similar ITSM/ticketing platforms to track incidents, requests, changes, and problem resolution.
• Cook up with network, cybersecurity, engineering, and service desk teams to support infrastructure changes, incident response, and steady-state operations.
• Maintain accurate system documentation, standard operating procedures, diagrams, and operational runbooks.

Required Skills & Experience

• Educational Background: Bachelor’s degree in Computer Science, Information Technology, or a related field plus at least 3 years of dedicated System Administration experience, OR 7+ years of progressive, hands-on experience in enterprise systems administration.
• Certifications: Active secret security clearance.
• Operating Systems: Proficiency in administering Windows Server, Active Directory, Group Policy (GPO), DHCP scopes, and MECM/SCCM collections and deployments; experience with Linux/Unix systems (RHEL, Ubuntu).
• Virtualization: Experience working with virtualization platforms, particularly VMware vSphere.
• Automation: Proficiency in PowerShell or Python for task automation and systems management.
• Networking: Basic knowledge of IP networking concepts including switching, routing, subnetting, and Ports, Protocols & Service Management (PPSM).
• Security & Compliance: Experience supporting Risk Management Framework (RMF) activities including IAVM management, patch management, and STIG hardening across various systems.
• Hardware: Hands-on experience with server hardware including rack mounting, blade server installation, and component-level maintenance (PCIe cards, RAM, drives, etc.).
• Service Management: Experience using ServiceNow or a comparable ITSM ticketing platform.

Preferred Qualifications

• Familiarity with container technologies such as Docker, or container orchestration platforms such as Kubernetes, VMware Tanzu, or Rancher.
• Experience writing Splunk queries (SPL).
• Experience administering IIS web servers and/or SQL Server.
• Experience with enterprise storage platforms such as NetApp ONTAP or Dell EMC OneFS.
• Experience with identity and authentication technologies including SSO, SAML, ADFS, or Okta.