Junior Systems Administrator

General information Requisition # R67752 Locations USA-Remote Work Posting Date 05/19/2026 Security Clearance Required Secret Remote Type Fully Remote Time Type Full time Description & Requirements Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions

Since 1968, we’ve been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact

Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more

Propel your career forward and be part of something extraordinary

Your journey starts now—protect and innovate with MANTECH! MANTECH seeks a motivated, career and customer-oriented Junior Systems Administrator to join our CASTLE-NET Program team

This is a remote position

Be a part of an agile team to provide innovative, customer focused, and cost-effective integrated enterprise IT support services in support of the client’s vision of engineering solutions for the Nation’s toughest challenges

Responsibilities include but are not limited to: Contribute to the management and maintenance of the IT infrastructure, ensuring reliability, performance, and security across various systems including Windows, Linux, and VMware environments

Involves the installation, configuration, maintenance, and support of servers and virtualized environments, working closely with IT teams, application developers, and stakeholders to develop configurations, troubleshoot issues, and ensure compliance with organizational policies and best practices

Ensuring system security, performance, and availability, as well as maintaining comprehensive documentation of system configurations and procedures