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Senior Associate, Systems Administrator – TS/SCI with FS Poly
L3Harris Technologies. Provide end-user desktop support for systems and applications locally and across the classified WAN .
Posted 9/15/2026full-timeCarlsbad • California • United StatesSenior💰 $83,000 - $118,000 per yearWebsite
Core Competencies
Role fitCore Competencies
Use this summary to align your resume positioning with the role.
Demonstrates expertise in providing end-user desktop support, system administration, and network management while ensuring compliance with security standards. Proficient in Microsoft Windows, Linux operating systems, and virtualization technologies, with strong communication skills for engaging both technical and non-technical stakeholders.
Highest-signal resume keywords
End-User Desktop SupportSystem AdministrationMicrosoft WindowsActive TS/SCI ClearanceLinux Operating Systems
ATS Keywords
Tailor your resumeApplicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard Skills
System AdministrationNetwork ManagementDesktop SupportPatchingPowerShellSecurity Best PracticesWindows Operating SystemLinux Operating SystemVirtualizationBackup and Recovery Solutions
Soft Skills
CommunicationCollaborationProblem-Solving
Tools & Technologies
Microsoft OfficeRed Hat Enterprise LinuxCentOSUbuntuVMwareCommvault
Certifications & Qualifications
Bachelor's DegreeGraduate DegreeActive TS/SCI Clearance
Industry Keywords
Classified WANCompliance StandardsTechnical IssuesRisk ManagementProgram Engineering
Tech Stack
Tools & technologiesLinuxTypeScriptVMware
About the role
Key responsibilities & impact- Provide end-user desktop support for systems and applications locally and across the classified WAN
- Perform routine system updates, patching, and hardening to reduce vulnerabilities and maintain compliance with applicable standards
- Partner with program engineering teams to understand requirements and deliver IT solutions aligned with program needs and schedules
- Communicate technical issues, risks, and recommendations to management and non-technical stakeholders
- Support classified Windows desktop systems and essential applications
- Perform system administration, network management, project coordination, and desktop/software support
Requirements
What you’ll need- Bachelor’s Degree and a minimum of 2 years of prior related experience
- Graduate Degree or equivalent with 0 to 2 years of prior related experience
- In lieu of a degree, minimum of 6 years of prior related experience
- Experience with Microsoft Windows and Microsoft Office applications
- Working knowledge of Windows and/or Linux operating systems, networking protocols, PowerShell, and security best practices
- Current active TS/SCI clearance with a full-scope polygraph
- Preferred: hands-on experience supporting Linux systems, including Red Hat Enterprise Linux (RHEL) 8/9, CentOS, and Ubuntu
- Preferred: experience administering VMware or comparable virtualization platforms
- Preferred: experience working with Commvault or similar backup and recovery solutions
Benefits
Comp & perks- Health and disability insurance
- 401(k) match
- Flexible spending accounts
- Employee Assistance Program (EAP)
- Education assistance
- Parental leave
- Paid time off
- Company-paid holidays
- 9/80 schedule with every other Friday off