We put our customers first – exemplified by our missions: “We Protect Those Who Protect Us®” and “We Innovate for Those Who Move the World.” Sound like a team you want to be a part of? Come build your career with BAE Systems.
BAE Systems is seeking a Senior Closed Area Systems Administrator to provide comprehensive technical and operational support for classified IT systems. Your key role will involve supporting Nessus remediation activities across all sites while working together with IT & Security Teams. This position requires a seasoned IT professional with expertise in managing complex, air-gapped systems and lab environments in accordance with DoD and Intelligence Community security requirements.

You will be responsible for the configuration, maintenance, and monitoring of secure networks and systems, including Lab-in-a-Box (LIB) environments, virtualization platforms, endpoint protection, and logging/alerting tools. This position is 100 onsite within a closed, classified area. Some after-hours or weekend support may be required for maintenance windows or incident response. You must be able to lift equipment (up to 40lbs) and work within controlled environments.

• Perform Nessus remediation activities; identifying and facilitating remediations tasks while collecting data and analytics pertinent to remediations.
• Provide desktop systems administration, including imaging, configuration, troubleshooting, and secure application support.
• Manage and monitor virtual server instances (e.g., VMware, Hyper-V), ensuring uptime, performance, and resource allocation.
• Lead and track monthly OS and application patching across desktops and servers, ensuring full compliance with security baselines and STIGs.
• Maintain domain health, DNS/DHCP, and group policy objects within Active Directory.
• Support system logging, event correlation, and incident response efforts within the closed area.
• Collaborate with ISSOs and security staff to ensure all system changes comply with RMF and local security policies.
• Maintain thorough system documentation, configuration baselines, and change logs.
• Support classified system accreditation activities and audits as needed.
• Perform user account administration, group policy configuration, and role-based access control in Active Directory for a classified environment

• US Citizenship.
• Active U.S. Secret Security Clearance and CompTIA Security+ or equivalent DoD 8570 IAT Level II certification.
• Minimum of a High School Diplima or equivalent
• 5-7 years of experience (4+ years of experience with a degree) as a system administrator.
• Direct experience configuring and managing Lab-in-a-Box (LIB) environments.
• Familiarity with data spill response protocols and secure system sanitization.
• Hands-on experience with Nessus, VMware vSphere, Veeam, and Trellix ePO.
• Strong Active Directory experience, including domain controller and GPO management.
• Working knowledge of Splunk in secure environments (including alerting and data retention strategies).
• Understanding of DoD and IC security standards, including RMF, NISPOM, and STIG compliance.