Windows and Linux Systems Administrator Jobs
Listed on 2026-08-22
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IT/Tech
Systems Administrator, Cybersecurity, Unix/Linux
Windows And Linux Systems Administrator
Position Title:
Windows and Linux Systems Administrator
Location:
San Diego, CA Clearance Requirements:
Active Secret Clearance Required Position Status: 6-month contract-to-hire Pay Rate:
Converts to $105-115K post Position
Description:
Seneca Resources is hiring a Windows and Linux Systems Administrator to support a critical Research, Development, Test, and Evaluation (RDT&E) network and secure enclaves for a federal defense client in San Diego. This is a fully onsite role where you will play a key part in maintaining secure infrastructure, hardening systems to federal standards, and contributing to the design and engineering of new capabilities in a classified environment.
Required Skills/
Education:
• Active Secret clearance
• IAT Level II certification required:
Security+ CE, GSEC, SCNP, or SSCP
• 3+ years of experience administering Windows 11 systems
• 3+ years of experience administering Red Hat Enterprise Linux (RHEL) systems
• Proficiency developing and executing Power Shell and Bash scripts
• Experience with the IAVM process including STIGs and patch compliance
• Familiarity with DISA hardening standards including STIGs and CTOs
• Experience maintaining asset tracking databases and developing SOPs
• Ability to support equipment procurement and coordinate shipping to remote teams Desired
Skills:
• Automation experience using Ansible playbooks
• Experience with endpoint security tools and solutions
• Strong communication and collaboration skills in a team-based environment
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