Systems Admin Sr

BAE Systems • San Diego, CA

3d

About The Position

We are seeking an experienced Systems Administrator to implement, maintain, and support our enterprise IT infrastructure consisting of Windows and Linux systems. The ideal candidate will have strong experience managing servers, identity services, virtualization platforms, endpoint systems, and security controls while demonstrating the ability to troubleshoot complex technical issues and improve operational efficiency. The Systems Administrator will play a key role in ensuring system availability, performance, security, and reliability while collaborating with IT teams, business stakeholders, and vendors to deliver effective technology solutions.

Requirements

• US Citizenship and ability to obtain a US government secret clearance
• CompTIA Security+ or equivalent DoD 8570 IAT Level II certification or ability to obtain within 6 months for hire
• 5-7 years of experience (4+ years of experience with a degree) as a system administrator.
• Strong experience supporting enterprise Windows Server environments.
• Advanced knowledge of Active Directory, Group Policy, DNS, DHCP, and Windows troubleshooting.
• Experience with virtualization technologies such as VMware or Horizon.
• Strong troubleshooting, analytical, and documentation skills.
• Active U.S. Secret Security Clearance.
• Bachelor’s degree in related field

Nice To Haves

• Experience administering Linux distributions such as Red Hat Enterprise Linux, Rocky Linux, Ubuntu, or similar platforms.
• Experience with vulnerability management platforms.
• Experience supporting regulated or highly available environments.

Responsibilities

• Administer and maintain Windows Server and Linux server environments.
• Manage Active Directory, Group Policy, DNS, DHCP, file services, and authentication services.
• Perform server installation, configuration, upgrades, migrations, and lifecycle management.
• Monitor system health, performance, capacity, and availability.
• Troubleshoot complex operating system, application, and infrastructure issues.
• Maintain enterprise workstations, servers, and endpoint management solutions.
• Manage VMware vSphere, Horizon, or other virtualization platforms.
• Deploy and maintain virtual machines, templates, snapshots, and resource allocation.
• Support storage, backup, and disaster recovery solutions.
• Perform system recovery testing and validate backup integrity.
• Support Microsoft Entra ID (Azure AD), identity synchronization, and cloud-based authentication.
• Assist with hybrid infrastructure and cloud migration initiatives.
• Develop and maintain PowerShell, Bash, or Python scripts to automate administrative tasks.
• Improve operational efficiency through automation, documentation, and standardization.
• Create and maintain technical documentation, procedures, and knowledge articles.
• Implement security best practices across servers, endpoints, and applications.
• Apply operating system patches, security updates, and vulnerability remediation.
• Manage endpoint security tools, encryption technologies, and access controls.
• Support audits, compliance requirements, and cybersecurity initiatives.
• Provide Tier 1 & 2 escalation support for complex technical issues.
• Collaborate with network, security, and application teams.
• Participate in after-hours maintenance activities and incident response when required.

Benefits

• health, dental, and vision insurance
• health savings accounts
• a 401(k) savings plan
• disability coverage
• life and accident insurance
• employee assistance program
• 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

What This Job Offers

• Job Type: Full-time
• Career Level: Senior