System Administrator

System Administrator – MidDelaware Nation Industries is seeking a System Administrator – Mid to support the Air Force Joint Worldwide Intelligence Communications System/Joint Interoperability Test and Services mission. The System Administrator will provide day-to-day administration, maintenance, monitoring, troubleshooting, and security support for enterprise systems operating across classified and unclassified environments.The successful candidate will work as part of a collaborative systems administration team supporting Linux and Windows platforms, virtualized infrastructure, network-connected services, and mission-critical users. This position requires sound technical judgment, strong documentation skills, and the ability to troubleshoot issues while maintaining system availability and compliance with DoD security requirements.ResponsibilitiesAdminister, configure, maintain, and troubleshoot Linux and Windows servers, workstations, applications, and related computing environments.Install operating systems, software, patches, updates, and security fixes in accordance with approved change-control and maintenance procedures.Monitor system health, availability, capacity, and performance; identify trends and recommend corrective actions.Perform Tier II and Tier III troubleshooting for hardware, operating system, application, virtualization, networking, and connectivity issues.Manage user accounts, permissions, groups, access controls, and system configurations in accordance with security policies.Support systems operating across classified and unclassified networks, including mission-essential environments and controlled data-transfer processes.Perform or support electronic and manual data transfers between authorized network environments.Maintain system backups, recovery procedures, configuration records, inventories, and standard operating procedures.Apply DISA Security Technical Implementation Guides (STIGs), vulnerability-remediation procedures, and other applicable DoD security controls.Support vulnerability scanning and remediation activities, including review and correction of findings from tools such as ACAS/Nessus when assigned.Assist with system builds, provisioning, integration, software installation, upgrades, and restoration activities.Support virtual machines and virtualized infrastructure, including VMware or comparable technologies.Coordinate with cybersecurity, network, service desk, application, and Government teams to resolve incidents and maintain continuity of operations.Document incidents, changes, troubleshooting actions, and resolutions in the designated IT service-management or configuration-management system.Participate in scheduled maintenance, testing, exercises, and after-hours or on-call support as required by the contract.Cross-train with other administrators and contribute to knowledge transfer, technical documentation, and process improvement. Delaware Nation Industries