Systems Admin Sr

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. 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. 

Key responsibilities include:
• Proficiency in Active Directory, including user/group management, OU structure, and GPOs.
• Configure, deploy, and maintain Lab-in-a-Box (LIB) environments used in closed area testing and 
mission scenarios.
• Develop and execute system shutdown and secure wipe procedures, in accordance with DoD and 
agency guidelines.
• Lead and coordinate data spill containment, response, and remediation actions in classified 
environments.
• Operate and manage Nessus vulnerability scanning, assessment reporting, and risk remediation 
tracking.
• Maintain and support VMware-based virtual infrastructure, including host management and 
resource allocation.
• Operate and manage Veeam backup and recovery solutions for secure system images and 
restoration planning.
• Administer Trellix ePO (McAfee) for endpoint protection policy management, signature updates, and 
alert resolution.
• Perform domain controller maintenance, including replication, DNS/DHCP services, and health 
monitoring.
• Design, implement, and troubleshoot Group Policy Objects (GPOs) in Active Directory.
• Support Splunk operations, including forwarder management, dashboard/report creation, and log 
analysis for auditing and threat detection.
• Ensure all systems are compliant with applicable STIGs, RMF controls, and cyber hygiene policies.
• Maintain system documentation, configuration change records, and contribute to audit readiness.
• Collaborate with ISSOs/ISSMs, facility security, and other stakeholders to ensure secure and 
compliant operations

• US Citizenship.
• Active U.S. Secret Security Clearance and CompTIA Security+ or equivalent DoD 8570 IAT Level 
II certification or ability to obtain.
• 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.

• Active U.S. TS/SCI Security Clearance.
• 4+ years of experience working in a classified environment
• Experience with system accreditation (e.g., SSP development, POA&M tracking).
• Familiarity with classified lab setups, test bed environments, or R&D support.
• Exposure to cross-domain solutions, enclave management, or SAP/SAR environments.
• Scripting experience (PowerShell, Python) to automate common sysadmin tasks.
• Experience supporting audit and inspection activities.

BAE Systems, Inc. is a defense, aerospace, and security company headquartered in Falls Church, Virginia, with more than 40,000 employees worldwide. We serve, supply, and protect those who protect us. As one of the most geographically diverse international defense companies, we deliver a full range of products and services spanning air, land, maritime, space, and cyber, including advanced electronics, intelligence solutions, and dedicated customer support.

Our culture is performance-driven and values-led, built on curiosity, creativity, and collaboration. Purpose isn't a tagline here. It's what drives us. We're developing breakthrough technologies that defend national security and make a lasting impact on our communities and our planet. When you join BAE Systems, you're not just building a career. You're contributing to a mission that truly matters.

This position will be posted for at least 5 calendar days. The posting will remain active until the position is filled, or a qualified pool of candidates is identified.