Intermediate Systems Administrator

ManTech International seeks an Intermediate Systems Administrator to support mission-critical federal and national security programs. In this role, you will deploy, configure, and maintain secure Windows and Linux servers, ensuring high availability, performance, and compliance with DoD and federal standards. Responsibilities include system hardening, patching, user and access management, backup and recovery, and incident resolution. You will automate routine tasks, document configurations, and collaborate with cyber, network, and engineering teams in a mission-focused, learning-oriented environment.