Senior Systems Administrator, TS​/SCI w​/Poly

Responsibilities

Mid-level Network / Desktop Administrator to support and maintain enterprise network and end-user computing infrastructure. This is a hybrid role combining hands‑on switching and network support with desktop/endpoint administration. The ideal candidate is comfortable working across the stack - from configuring VLANs and port security on Cisco switches to imaging endpoints and troubleshooting Windows 10/11 clients - while delivering responsive, professional customer support to end users.

This role balances infrastructure work with day-to-day operational support and requires someone who can work independently on routine tasks and elevate appropriately on complex issues.

• Configure, maintain, and troubleshoot Cisco switches running IOS-XE and NX-OS.
• Implement and manage port security, including MAC-based controls and violation remediation.
• Support enterprise network fundamentals: TCP/IP, subnetting, DHCP/DNS behavior, and Layer 2/Layer 3 troubleshooting.
• Support and help maintain VDI / thin-client infrastructure, including endpoint provisioning and connectivity troubleshooting.
• Perform endpoint imaging and deployment via PXE boot and associated deployment tooling.
• Administer Windows 10 and Windows 11 endpoints, including configuration, troubleshooting, and lifecycle support.
• Execute patch management and remediate vulnerabilities in response to IAVAs, ensuring systems remain compliant with security baselines and STIGs.
• Use CLI and administrative tooling — PuTTY, Power Shell, and Windows CMD — for configuration, diagnostics, and routine automation.
• Support STE/STN environment and associated operational procedures.
• Perform Active Directory tasks such as account and group management, OU navigation, and basic Group Policy awareness.
• Document configurations, procedures, and changes; follow existing standards and conventions.
• Provide high-quality customer service and end-user support, including ticket handling and clear communication with non-technical staff.
• Coordinate across teams on cross-functional dependencies.

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• Bachelor’s degree in a technical discipline and 15 years of system administration experience. Five years of additional experience may be substituted for a BS.
• An active TS/SCI w/Poly is required.
• 5+ years of combined experience in network administration (mid-level) to include working knowledge of Cisco switches on IOS-XE and NX-OS platforms and a solid grasp of networking fundamentals: VLANs, subnetting, TCP/IP, DHCP, DNS, and switching concepts.
• 10+ years’ experience administering the customer’s classified VDI / thin-client desktop platform
• 10+ years’ experience in Windows 10 and/or Windows 11 administration and troubleshooting.
• Strong customer service orientation and clear written/verbal communication.
• Working knowledge of port security concepts and remediation.
• Hands‑on experience with PXE-based imaging/deployment.
• Proficiency with PuTTY, Power Shell, and Windows command-line tools.
• Active Directory user/group administration experience.
• Strong understanding of patch management processes and vulnerability remediation (IAVA-driven).
• Experience with endpoint management platforms (SCCM/MECM, Big Fix).
• Familiarity with security baselines and STIG compliance.
• Exposure to ticketing/ITSM systems JIRA
• Basic firewall awareness and coordination experience (e.g., Cisco Firepower/ASA).
• Familiarity with remote administration tools.
• Understanding of structured cabling, patch panels, and physical connectivity.
• Basic scripting/automation for repetitive administrative tasks.

Required Certification:

• CompTIA Security+

Preferred Certification:

• Cisco CCST or CCNA

Benefits:
Peraton offers enhanced benefits to employees supporting this critical National Security…