Senior IT Systems Administrator Jobs

Systems Administrator

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. 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.

• 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.

Virtualization & Infrastructure

• 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.

Cloud & Enterprise Applications

• Support Microsoft Entra  (Azure AD), identity synchronization, and cloud-based authentication.
• Assist with hybrid infrastructure and cloud migration initiatives.

Automation & Process Improvement

• Develop and maintain Power Shell, 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.

Security & Compliance

• 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.

Support & Collaboration

• 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.

Required Education, Experience, & Skills

• 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.

Preferred Education, Experience, & Skills

• Active U.S. Secret Security Clearance.
• Bachelor's degree in related field
• 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.

Pay Information Full-Time Salary Range: $97008 - $164914

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…