Systems Administrator (Linux & Windows Server)

Aliso Viejo, CA

Full Time 

Position Overview

Take ownership of critical enterprise infrastructure by upgrading, integrating, and maintaining Linux, Windows Server, storage, and virtualization environments. This hands-on role focuses on keeping systems stable, secure, and ready for production while supporting major infrastructure initiatives.

What You'll Do

• Deploy, configure, and maintain Linux servers (Ubuntu, CentOS, or RHEL).
• Execute foundational data migration and prepare designated shares for validation.
• Integrate newly installed enterprise storage hardware into the core network.
• Complete physical installation of new Hyper-V infrastructure.
• Configure storage clusters and Hyper-V compute environments for production workloads.
• Administer Windows Server, Active Directory, Group Policy, and user permissions.
• Manage enterprise storage, backups, data integrity, and capacity planning.
• Perform hardware audits, software patching, and system updates.
• Troubleshoot complex system failures and conduct root cause analysis.
• Maintain technical documentation, disaster recovery plans, and system procedures.

Required Qualifications

• Mid-level experience administering Linux servers using command-line tools.
• Experience with shell scripting using Bash or Python.
• Proven ability to manage Windows Server alongside Linux environments.
• Familiarity with SAN/NAS, RAID, and enterprise backup solutions.
• Understanding of TCP/IP, DNS, DHCP, and firewall fundamentals.
• Ability to work independently while managing multiple infrastructure projects.

Preferred Qualifications

• CompTIA Linux+, RHCSA, or Microsoft Windows Server certification.
• Experience with VMware, Hyper-V, or KVM virtualization.

Experience supporting high-availability environments