Systems Administrator

Vosper Thornycroft Group; Chantilly (VA); On-site; USD 85,000 - 115,000; Full time

Job summary

A defense technology company is seeking a skilled Systems Administrator to manage and support enterprise IT infrastructure. Responsibilities include ensuring server, network, and system reliability and security, and performing IT operations. Candidates must have a Bachelor's degree, 5+ years of experience in systems administration, and an active TS/SCI with Polygraph security clearance. The role involves troubleshooting, system patching, and collaborating with other teams for infrastructure support.

Qualifications

• Active TS/SCI with Polygraph required.
• Bachelor’s degree in a relevant field or equivalent experience.
• 5+ years of experience in systems administration or IT operations.

Responsibilities

• Install, configure, and maintain servers and applications.
• Monitor system performance, availability, and security.
• Manage user accounts and permissions.

Skills

Active TS/SCI with Polygraph

Systems administration experience

Windows and/or Linux server environments

Scripting (PowerShell, Bash, Python)

Virtualization technologies (VMware, Hyper-V)

Networking fundamentals (TCP/IP, firewalls, VPNs)

Active Directory, DNS, DHCP, Group Policy

Education

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

Job description

Overview

We are seeking a skilled Systems Administrator to manage, maintain, and support enterprise IT infrastructure. This role is responsible for ensuring the reliability, security, and performance of servers, networks, and systems while supporting day-to-day operations and long-term IT initiatives.

What will you do?

• 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

Do you have what it takes?

• 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 managementProficiency in scripting or automation (PowerShell, Bash, Python)