BAE Systems

Systems Admin Sr

BAE Systems$95K — $115K *
Aerospace & Defense
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • US Citizenship required.
  • Active U.S. Top Secret Security Clearance with SCI eligibility.
  • CompTIA Security+ or equivalent DoD 8570 IAT Level II certification required.
  • 5-7 years as a system administrator required, or 4+ years with a degree.
  • Experience with Lab-in-a-Box (LIB) environments essential.
  • Hands-on experience with Nessus, VMware vSphere, Veeam, and Trellix ePO required.
  • Strong Active Directory management experience needed.

Responsibilities

  • Configure, maintain, and monitor secure networks and systems.
  • Develop and execute system shutdown and secure wipe procedures.
  • Lead data spill containment and remediation actions in classified settings.
  • Operate Nessus for vulnerability scanning and risk remediation tracking.
  • Maintain VMware-based virtual infrastructure and manage resources.
  • Manage Veeam for secure system image backups and recovery.
  • Support Splunk operations for log analysis and threat detection.

Benefits

  • Comprehensive technical and operational support for classified IT systems.
  • Work in a closed, controlled environment ensuring operational security.
  • Opportunities for after-hours or weekend support for maintenance and incidents.
  • Potential for professional development in a highly secure environment.
Full Job Description
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.


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.

Required Skills and Education

  • US Citizenship.
  • Active U.S. Top Secret Security Clearance with SCI eligibility and CompTIA Security+ or equivalent DoD 8570 IAT Level II certification.
  • 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 retentionstrategies).
  • Understanding of DoD and IC security standards, including RMF, NISPOM, and STIG compliance.


Preferred Skills and Education

  • Active U.S. TS/SCI Security Clearance with CI Poly
  • 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.

About BAE Systems

BAE Systems plc is a British multinational arms, security, and aerospace company. It is among the world's largest defense contractors, with over 85,000 employees and operations in over 40 countries. BAE Systems is involved in the design, development, and manufacture of a wide range of products and services, including military aircraft, naval ships, and land vehicles. The company also provides a range of cybersecurity and intelligence services. BAE Systems has a long history, dating back to the 19th century, and has been involved in many major defense projects. Visit baesystems.com for more information.
Learn more about BAE Systems
Size
90,500 employees
Industry
Founded
1997
NASDAQ

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