Weekend Admin Jobs in California (NOW HIRING)

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.
About BAE Systems Electronic Systems
BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. Improving the future and protecting lives is an ambitious mission, but it's what we do at BAE Systems. Working here means using your passion and ingenuity where it counts - defending national security with breakthrough technology, superior products, and intelligence solutions. As you develop the latest technology and defend national security, you will continually hone your skills on a team-making a big impact on a global scale. At BAE Systems, you'll find a rewarding career that truly makes a difference. Electronic Systems (ES) is the global innovator behind BAE Systems' game-changing defense and commercial electronics. Exploiting every electron, we push the limits of what is possible, giving our customers the edge and our employees opportunities to change the world. Our products and capabilities can be found everywhere - from the depths of the ocean to the far reaches of space. At our core are more than 14,000 highly talented Electronic Systems employees with the brightest minds in the industry, we make an impact - for our customers and the communities we serve.
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

• 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
• 7 or more years of relevant System Administration experience and a minimum of a high school diploma
• 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 Skills and Education

• 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.