Because this role involves a combination of collaborative/in-person and independent work, it will take the form of a hybrid work format, with time split between working onsite and remotely. See what you’re missing. Our employees work on the world’s most advanced electronics – from detecting threats for F-35 pilots to illuminating the night for soldiers. Spanning air, land, sea, and space, we are developing the technology of tomorrow, delivered today. Drawing strength from our differences, we’re innovating for the future. And you can, too. Our flexible work environment provides you a chance to change the world without giving up your personal life. We put our customers first – exemplified by our mission: “We Protect Those Who Protect Us®.” Sound like a team you want to be a part of? Come build your career with BAE Systems. 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? vCome 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. Responsibilities Systems Administration 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 ID (Azure AD), identity synchronization, and cloud-based authentication. Assist with hybrid infrastructure and cloud migration initiatives. Automation & Process Improvement 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. 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. Mentor & Leadership Functions as a go-to SME (Subject Matter Expert) for the site’s Sys Admins and/or become a Lead IT OPS person for the site - functioning as a last-line-of-defense answer person for an assigned team Operate as a primary contact for the infrastructure, deployment, and Engineering tools teams to assist with performing technical design, planning, implementation, and high-level performance tuning of Windows / Linux OS and application servers and workstations tools. Write technical documentation and troubleshooting guides on process & procedures for how to rollout solutions for all lower-level Sys Admin personnel to follow. Maintain a central repository of above documentation and software tools that all Sys Admins are made aware of and utilize consistently, to follow and adhere to standard processes. Provide final tier troubleshooting of server and desktop application functionality when lower-level Sys Admin personnel need assistance. Mentor / train up-and-coming admins that show proficiency to help them obtain the level of principal admin over time.