Senior Systems Administrator (TS/SCI) | Automation

VTG Defense; McLean (VA); On-site; USD 100,000 - 150,000; Full time

Job summary

VTG Defense in McLean, VA is seeking a Systems Administrator to manage enterprise IT infrastructure, ensuring reliability, security, and performance of servers, networks, and applications.

You will install, patch, monitor, and troubleshoot across Windows and Linux environments, manage AD/DNS/DHCP, automate tasks with PowerShell, Bash, or Python, and collaborate with security and development teams to meet regulatory requirements.

Qualifications

• Requires TS/SCI clearance with Polygraph.
• 5+ years of systems administration/IT operations experience.
• Experience with Windows and/or Linux server environments.
• Experience with Active Directory, DNS, DHCP, and Group Policy.
• Familiarity with virtualization technologies (VMware, Hyper‑V).
• Proficiency in scripting/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 standard operating procedures.
• 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

Security clearance TS/SCI with Polylog

Windows Server

Linux Server

Active Directory

Scripting (PowerShell, Bash, Python)

Networking fundamentals (TCP/IP, firew

VMware

Hyper-V

Education

Bachelor's degree in Information Technology, Computer Science, or related field

Tools

VMware

Hyper-V

Job description

VTG Defense in McLean, VA is seeking a Systems Administrator to manage enterprise IT infrastructure, ensuring reliability, security, and performance of servers, networks, and applications.

You will install, patch, monitor, and troubleshoot across Windows and Linux environments, manage AD/DNS/DHCP, automate tasks with PowerShell, Bash, or Python, and collaborate with security and development teams to meet regulatory requirements.