Windows Server Administrator – Security Clearance Required

Windows Server Administrator – Active Security Clearance Required

Mid-Senior Level | Full-time
Information Technology/Computing | Livermore, CA | 09/18/2026
Reference #: REF
8869A
Job Code: 393.1 Systems & Network Associate / 393.2 Systems & Network Sr Associate
Organization: Computing
Position Type: Career Indefinite
Security Clearance: Active DOE Q clearance (or active Top Secret clearance) with Sensitive Compartmented Information access
Drug Test: Required for external applicant(s) selected for this position (includes testing for use of marijuana)
Medical Exam: Not applicable

Join us and make YOUR mark on the World!

Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthen U.S. security and promote global stability.

Our mission spans four critical national security areas nuclear deterrence, threat preparedness, energy security, and multi-domain defense empowering teams to take on the toughest challenges of today and tomorrow. With a culture built on innovation and operational excellence, LLNL is a place where your expertise can make a real impact.

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 Power Shell 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…