Senior Systems Administrator - TS/SCI with Poly

VT Group (VTG); Chantilly (VA); On-site; USD 95,000 - 135,000; Full time

Job summary

VT Group (VTG) is seeking a skilled Systems Administrator to manage enterprise IT infrastructure in Chantilly, VA. You will install, configure, and maintain servers and applications, monitor performance, and support day‑to‑day operations.

This role requires TS/SCI with Polygraph, a bachelor’s in IT or related field, 5+ years of experience, Windows and/or Linux servers, AD/DNS/DHCP/GP, virtualization (VMware/Hyper‑V), networking, monitoring, and scripting (PowerShell, Bash, Python).

Qualifications

• Active TS/SCI with Polygraph required.
• Bachelor's degree in Information Technology, Computer Science, or related field (or equivalent experience)
• 5+ years of experience in systems administration or IT operations
• Strong experience with Windows and/or Linux server environments
• Experience with Active Directory, DNS, DHCP, and Group Policy
• Familiarity with virtualization technologies (VMware, Hyper-V)
• Knowledge of networking fundamentals (TCP/IP, firewalls, VPNs)
• Experience with system monitoring tools and log management
• Proficiency in scripting or automation (PowerShell, Bash, Python)

Responsibilities

• Install, configure, and maintain servers, operating systems, and enterprise applications
• Monitor system performance, availability, and security across environments
• Manage user accounts, permissions, and access controls (Active Directory, IAM)
• Perform system patching, updates, and vulnerability remediation
• Troubleshoot hardware, software, and network issues across infrastructure
• Support backup, disaster recovery, and business continuity processes
• Maintain system documentation, configurations, and SOPs
• Collaborate with network engineers, security teams, and developers to support infrastructure needs
• Automate routine tasks using scripting (PowerShell, Bash, Python)
• Ensure systems comply with security policies and regulatory requirements

Skills

Windows Server

Linux Server

Active Directory

VMware/Hyper-V

Scripting (PowerShell, Python, Bash)

Networking basics (TCP/IP, VPNs)

Monitoring & log management

Education

Bachelor's degree in IT / CS or related field

Tools

VMware

Hyper-V

Job description

VT Group (VTG) is seeking a skilled Systems Administrator to manage enterprise IT infrastructure in Chantilly, VA. You will install, configure, and maintain servers and applications, monitor performance, and support day‑to‑day operations.

This role requires TS/SCI with Polygraph, a bachelor’s in IT or related field, 5+ years of experience, Windows and/or Linux servers, AD/DNS/DHCP/GP, virtualization (VMware/Hyper‑V), networking, monitoring, and scripting (PowerShell, Bash, Python).