Senior Specialist, Systems Administrator

L3Harris Technologies

System/Network Administrator maintaining classified Windows systems at L3Harris Technologies. Responsible for system administration, network management, desktop support, and compliance activities.

Posted 6/20/2026full-timeCarlsbad • California • 🇺🇸 United StatesSenior💰 $91,500 - $170,500 per yearWebsite

ATS Keywords

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Hard Skills

Windows serversLinux operating systemsnetworking protocolsPowerShellsecurity best practicesRed Hat Enterprise LinuxCentOSUbuntuCommvaultAnsible

Soft Skills

end user supportcollaborationcommunicationtechnical problem solvingrisk assessment

Tools & Technologies

virtualization platformsbackup systemsnetwork infrastructurescriptsautomation tools

Certifications & Qualifications

Bachelor’s DegreeGraduate DegreeActive TS/SCI clearanceFull-Scope Polygraph

Industry Keywords

System AdministratorNetwork Administratorenterprise-level domain environmentNIST Risk Management Frameworkcompliance standards

Tech Stack

Tools & technologies

AnsibleLinuxTypeScriptVMware

About the role

Key responsibilities & impact

Administer and maintain Microsoft Windows servers, client systems, backup systems, network infrastructure, and databases.
Provide end user desktop support for systems and applications at the local site and across the classified WAN.
Build, configure, and maintain physical and virtual Windows servers in support of program requirements.
Perform regular system updates, patching, and hardening activities to reduce vulnerabilities and ensure compliance with applicable standards.
Develop and maintain scripts and automation tools to streamline deployment and improve operational efficiency.
Collaborate with engineering teams to understand program requirements and deliver effective technical solutions.
Communicate complex technical issues, risks, and recommendations clearly to management and non-technical stakeholders.

Requirements

What you’ll need

Bachelor’s Degree and minimum 6 years of prior relevant experience
Graduate Degree and a minimum of 4 years of prior related experience; or, in lieu of a degree, minimum of 10 years of prior related experience
Active TS/SCI clearance with Full-Scope Polygraph
6 years of experience as a System/Network Administrator supporting an enterprise-level domain environment
Strong knowledge of Windows and/or Linux operating systems, networking protocols, PowerShell, and security best practices
Experience supporting Linux systems, including Red Hat Enterprise Linux (RHEL) 8/9, CentOS, and Ubuntu.
Experience with Commvault or similar enterprise level backup system
Experience with VMware or similar virtualization platforms
Experience with Ansible
Experience managing systems in compliance with the NIST Risk Management Framework (RMF)

Benefits

Comp & perks

Health and disability insurance
401(k) match
Flexible spending accounts
EAP
Education assistance
Parental leave
Paid time off
Company-paid holidays