Senior Associate, Systems Administrator (Carlsbad) (TS/SCI with FS Poly)
L3HARRIS Technologies
Carlsbad, CA · Posted October 13, 2026
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Where Carlsbad, CA ranks
Where Carlsbad, CA placed in our monthly rankings, month by month. Each month stays online at its own address.
November 2026
- #9Best cities for mid-career professionals in the West Coast61% · of 71
- #18Best cities for mid-career professionals61% · of 100
- #21Best cities for software and engineering jobs in the West Coast145 openings · of 60
- #24Cities with the most jobs that do not need a four-year degree in the West Coast31 jobs · of 47
- #24Cities where the biggest share of jobs do not need a four-year degree in the West Coast13% · of 53
Rankings about engineering jobs
- Best cities for software and engineering jobs #1 San Francisco (3,412 openings)
- Best cities for engineering pay after cost of living #1 San Mateo ($216k)
- Most requested AI skills in engineering jobs #1 AI tools in daily work (6.1%)
- AI tools named most often in engineering jobs #1 Claude (1.7%)
- Employers with the most engineering jobs #1 Amazon (2,992 roles)
How AI is used in this kind of work
Among database administrators, AI is already used for a large share of the tasks. Measured exposure for database administrators: 33% (high).
Share of this job’s tasks that AI is already used for at work, from real usage. It is not a forecast of job loss, and a low number means no use seen yet. Source: Anthropic Economic Index.
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About the job
Job Title: Sr. Associate Systems Administrator Job Code: 44350 Job Location: Carlsbad, CA Job Schedule: 9/80: Employees work 9 out of every 14 days – totaling 80 hours worked, and have every other Friday off
Job Description:
We are seeking a dedicated System/Network desktop support administrator to join our IT team. The ideal candidate will be responsible for supporting classified Windows desktop systems and essential applications. This role combines system administration, network management, project coordination, and desktop/software support to ensure reliable and secure day-to-day operations.
Essential Functions:
Provide end-user desktop support for systems and applications both 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 effectively to management and non-technical stakeholders.
Qualifications:
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 Additional Skills:
Hands-on experience supporting Linux systems, including Red Hat Enterprise Linux (RHEL) 8/9, CentOS, and Ubuntu.
Experience administering VMware or comparable virtualization platforms.
Experience working with Commvault or similar backup and recovery solutions.
In compliance with pay transparency requirements, the salary range for this role in California, Massachusetts, New Jersey, Washington, and the Greater D.C. area, Denver, or NYC areas is [$83,000 MIN - $118,000 MAX].This is not a guarantee of compensation or salary, as final offer amount may vary based on factors including but not limited to experience and geographic location. L3Harris also offers a variety of benefits, including health and disability insurance, 401(k) match, flexible spending accounts, EAP, education assistance, parental leave, paid time off, and company-paid holidays. The specific programs and options available to an employee may vary depending on date of hire, schedule type, and the applicability of collective bargaining agreements.