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.