**Job Description** 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 highly trained and motivated Principal Closed Area Systems Administrator to lead and manage classified IT infrastructure operations in support of national security missions. This role is pivotal in ensuring the integrity, security, and availability of systems operating within Sensitive Compartmented Information Facilities (SCIFs) or other closed environments. You will serve as the technical lead for IT services, security compliance, and infrastructure readiness across high-impact, mission-critical programs. 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. **_In this Principal System Administrator position you will make impats in the following ways_** + Administer patch management for RHEL-based Linux systems, including vulnerability scanning, patch deployment, and compliance validation. + Install and configure Trellix (McAfee) Linux Agents for endpoint protection and ePO integration. + Deploy and configure Splunk Universal Forwarders on Linux systems; manage log ingestion and index routing. + Reset LDAP BIND credentials within Splunk, ensuring connectivity and access control integration. + Perform VCSA (vCenter Server Appliance) patching and lifecycle operations. + Apply updates to VMware ESXi hosts, ensuring host profile compliance and uptime. + Access and navigate the ESXi Direct Console User Interface (DCUI) for low-level host management. + Perform Exchange operations in a classified environment including user mailbox creation, troubleshooting, and routine maintenance. + Manage and maintain NetApp storage systems, including volumes, snapshots, and secure protocols. + Operate in VMware vSphere environments, including provisioning, performance monitoring, and resource management. + Install, configure, and maintain WSUS (Windows Server Update Services) for enterprise Windows patching. + Maintain comprehensive documentation and contribute to RMF packages and audit readiness. + Collaborate with ISSOs, security staff, and other IT stakeholders to ensure secure, compliant, and high-performing system operations. **Required Education, Experience, & Skills** + Active U.S. Secret Security Clearance and CompTIA Security or equivalent DoD 8570 IAT Level II certification + Active U.S. Government Top Secret Clearance with ability to obtain SCI. + 10 years of experience (7 years of experience with a degree) as a system administrator. + Strong command of Linux RHEL patching workflows and package management tools (e.g., YUM/DNF). + Experience with Trellix/McAfee agent installation on Linux systems and ePO integration. + Hands-on expertise with Splunk Universal Forwarders, indexers, and LDAP integration. + Experience with VMware infrastructure, including vCenter, VCSA, ESXi, and DCUI access. + Working knowledge of Microsoft Exchange administration. + Familiarity with NetApp management tools and SAN/NAS storage concepts. + Solid experience operating within vSphere environments in mission-critical settings. + Proven ability to configure and manage WSUS for Windows update distribution. **Preferred Education, Experience, & Skills** + Active U.S. TS/SCI Security Clearance. + 4 year college degree in a technical field highly preferred + Experience supporting system accreditation efforts (SSP, POA&M, RMF). + Scripting skills (e.g., Bash, PowerShell) for automation and task efficiency. + Familiarity with DISA STIGs, Nessus vulnerability scanning, and cyber compliance frameworks. + Prior experience in secure lab or test bed environments (Lab-in-a-Box, SAP/SAR support) **Pay Information** Full-Time Salary Range: $115779 - $196825 Please note: This range is based on our market pay structures. However, individual salaries are determined by a variety of factors including, but not limited to: business considerations, local market conditions, and internal equity, as well as candidate qualifications, such as skills, education, and experience. Employee Benefits: At BAE Systems, we support our employees in all aspects of their life, including their health and financial well-being. Regular employees scheduled to work 20 hours per week are offered: health, dental, and vision insurance; health savings accounts; a 401(k) savings plan; disability coverage; and life and accident insurance. We also have an employee assistance program, a legal plan, and other perks including discounts on things like home, auto, and pet insurance. Our leave programs include paid time off, paid holidays, as well as other types of leave, including paid parental, military, bereavement, and any applicable federal and state sick leave. Employees may participate in the company recognition program to receive monetary or non-monetary recognition awards. Other incentives may be available based on position level and/or job specifics. **Principal Systems Administrator** **113660BR** EEO Career Site Equal Opportunity Employer. Minorities . females . veterans . individuals with disabilities . sexual orientation . gender identity . gender expression