Key Responsibilities Provide cybersecurity-focused systems administration, sustainment, and technical support for the flight's Windows- and Linux-based data-processing, software-development, test-support, and mission-information environments. Operate, maintain, troubleshoot, secure, patch, upgrade, and document servers, workstations, virtualized environments, storage, network services, and associated applications. Perform system configuration; Security Technical Implementation Guide (STIG) compliance and security hardening; account, privilege, and access management; vulnerability scanning and remediation; configuration and change management; backup and recovery; audit-log review; incident-response support; and maintenance of cybersecurity and system documentation. Provide systems-administration and cybersecurity support for Automation/Artificial Intelligence (A/AI) and Modeling and Simulation (ModSim) systems supporting the Seeker and Sensor open-air test mission. This includes standalone large language model (LLM) capabilities in air-gapped environments; GPU-accelerated computing resources; containerized applications; software libraries; automated workflows; test-support applications; and data pipelines. Perform all work in accordance with applicable Department of War cybersecurity requirements, Risk Management Framework (RMF) controls, applicable security implementation guidance (including JSIG), configuration-management procedures, and secure DevSecOps practices. Install new or rebuild existing servers (both physical and virtual) and configure hardware, peripherals, services, settings, directories, and storage in Windows and Linux environments. Participate in the end-to-end process of obtaining an Authority to Operate (ATO) and the activities required to maintain that authority. Conduct risk and vulnerability assessments of planned and installed information systems to identify vulnerabilities, risks, and protection needs tailored through the RMF; identify tactics, techniques, and procedures used by malicious actors and recommend remediation strategies. Apply information security policies, methods, standards, FISMA, and NIST standards and practices to organizational information systems. Perform all functional duties independently in a fast-paced environment and take responsibility for identifying, organizing, coordinating, and executing necessary tasks leading to successful accomplishment of assigned duties. Required Qualifications Over 3 years of systems administration experience supporting Windows and Linux environments. Must hold an active Secret security clearance. Must have a DoW 8140 Cyber Workforce Qualification certification (i.e., Security +). Strong experience with Windows Server (2012/2016/2019/2022) and Windows 10/11 administration. Demonstrated experience with STIG compliance, security controls implementation, and security incident handling per JSIG. Experience supporting RMF processes and ATO maintenance. Desired Qualifications Familiarity with Department of War (D0W) Enterprise Networks. Strong understanding of DoW Cybersecurity and Information Assurance processes; experience with secure DevSecOps practices. Experience with virtualization technologies, containerized applications, GPU-accelerated computing resources, and modern system monitoring tools; familiarity with Automation/AI (A/AI), Modeling and Simulation (ModSim), or large language model (LLM) systems in air-gapped environments. Education Requirements Bachelor's or Master's degree in a relevant field. Degree requirements may be substituted with an applicable Associate's degree and additional years of relevant experience.