We’re looking for a Windows Systems Administrator to provide advanced technical computer, infrastructure, and operations support for enterprise Windows systems and related services. You will work in a safety-conscious, challenging, rapidly changing, and team-oriented environment to solve complex technical problems in a timely manner. This position is in the Information Technology Operations, ITO, Division within the Computing Directorate. This position requires full-time on-site presence due to the nature of the work. This position will be filled at either level based on knowledge and related experience as assessed by the hiring team. Additional job responsibilities (outlined below) will be assigned if hired at the higher level. You will  Perform advanced troubleshooting and administration for Windows Server, Active Directory, DNS, Group Policy, authentication, and related system integrations. Install, configure, maintain, patch, harden, and secure Windows servers and supporting infrastructure services. Administer enterprise backup systems, including job monitoring, failure remediation, restore operations, retention management, and recovery validation. Analyze complex incidents, identify root causes, implement corrective actions, and document resolutions. Develop and maintain PowerShell scripts and utilities to automate administration, monitoring, reporting, and support processes. Support cybersecurity operations, including account management, access controls, vulnerability remediation, system monitoring, compliance activities, and preparation of technical artifacts for Assessment and Authorization and ATO activities. Provide technical guidance and escalation support to Tier 1 and Tier 2 staff, and maintain accurate SOPs, knowledge articles, and system documentation. Participate in infrastructure upgrades, migrations, disaster-recovery and business-continuity exercises, datacenter operations, and operational improvement projects across Corporate and Isolated Networks. Perform other duties as assigned. Additional job responsibilities, at the 393.2 level  Diagnose, troubleshoot, and resolve highly complex Windows, system, network, backup, and integration problems, including driving problem resolution, working with vendors, and managing support cases as required. Serve as a technical leader and internal and external consultant, providing highly advanced technical assistance to the user community and collaborating with customers in the design and implementation of computing environments. Provide technical leadership for complex upgrades, migrations, disaster-recovery activities, cybersecurity remediation, and operational improvement projects. Mentor Tier 1 and Tier 2 staff and provide guidance on troubleshooting methods, system administration practices, and technical procedures. Lead root-cause investigations and develop corrective actions for recurring or highly complex incidents. Support the development, review, and maintenance of technical artifacts and evidence for ATO packages and other compliance activities.