BAE Systems, Inc. · 2 weeks ago
Senior Linux System Administrator
San Diego, CA
Full-time
Onsite
Mid, Senior Level
$95K/yr - $162K/yr
4+ years expBAE Systems, Inc. is seeking a Senior Closed Area Linux Systems Administrator to provide comprehensive technical and operational support for classified IT systems. The role involves managing complex air-gapped systems, configuring and maintaining Linux-based servers, and ensuring compliance with DoD security requirements.
Defense & Space
No H1B
Security Clearance RequiredU.S. Citizen Only
Responsibilities
Proficiency in Active Directory, including user/group management, OU structure, and GPOs
Install, configure, and maintain Linux-based servers and systems
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
Qualification
Required
US Citizenship is required by contract
Active U.S. Secret Security Clearance is required with the ability to obtain a Top Secret- SCI along with an active CompTIA Security+ or equivalent DoD 8570 IAT Level II certification
4-7 years of experience and high school diploma or (4+ years of experience with a degree) as a system administrator in a Linux OS environment
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
Preferred
Active U.S. TS/SCI/Poly 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
Benefits
Health, dental, and vision insurance
Health savings accounts
A 401(k) savings plan
Disability coverage
Life and accident insurance
Employee assistance program
A legal plan
Discounts on things like home, auto, and pet insurance
Paid time off
Paid holidays
Paid parental leave
Military leave
Bereavement leave
Any applicable federal and state sick leave
Company recognition program to receive monetary or non-monetary recognition awards
Company
BAE Systems, Inc.
Improving the future and protecting lives is an ambitious mission, but it’s what we do. BAE Systems, Inc. is the U.S.
10001+ employees
Funding
Current Stage
Late StageLeadership Team
Tom Arseneault
President & Chief Executive Officer, BAE Systems, Inc.
Don Widener, PhD
Chief Technology Officer, Intelligence Solutions
Recent News
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