Senior Systems Administrator – Secure IT & Automation Lead

VTG Defense; Herndon (VA); On-site; USD 120,000 - 160,000; Full time

Job summary

VTG Defense seeks a Systems Administrator to manage and secure enterprise IT infrastructure, ensuring reliability and performance of servers, networks, and applications. You will install, configure, and maintain systems, monitor performance, and support incident response, backups, and DR planning.

The role requires TS/SCI with Polygraph, a relevant Bachelor's, and 5+ years of hands-on experience with Windows/Linux, AD/DNS/DHCP, and virtualization (VMware/Hyper-V).

Qualifications

• Active TS/SCI with Polygraph required.
• 5+ years of experience in systems administration or IT operations.
• Strong experience with Windows and/or Linux server environments.
• 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 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

Scripting / Automation

Windows Server

Linux Server

Education

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

Tools

Active Directory

DNS

DHCP

Group Policy

VMware

Hyper-V

PowerShell

Bash

Python

Job description

VTG Defense seeks a Systems Administrator to manage and secure enterprise IT infrastructure, ensuring reliability and performance of servers, networks, and applications. You will install, configure, and maintain systems, monitor performance, and support incident response, backups, and DR planning.

The role requires TS/SCI with Polygraph, a relevant Bachelor's, and 5+ years of hands-on experience with Windows/Linux, AD/DNS/DHCP, and virtualization (VMware/Hyper-V).