Principal Systems Administrator – Avionics

Northrop Grumman

. Maintain smooth operation of multi-user computer systems .

Posted 11/11/2026full-timeSan Diego • California • United StatesLead💰 $103,600 - $155,400 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Systems Administration, including managing Windows and Linux environments, ensuring security compliance, and providing technical support for multi-user systems. Proficient in analyzing requirements, implementing system enhancements, and maintaining security protocols for classified environments.

Highest-signal resume keywords

Windows Server ManagementLinux Operating System ExperienceSecurity+ CE CertificationActive US Government Top Secret ClearanceNetworking Knowledge Including Subnets and VLANs

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Systems AdministrationWindows Domain ArchitectureVMware ExperienceServer ManagementScripting ExperienceConfiguration ManagementBackup and Recovery ServicesFile System ManagementAutomated-System SolutionsTechnical Process Documentation

Soft Skills

Effective CommunicationProblem ResolutionTeam Coordination

Tools & Technologies

VMwareWindows ADLDAPSAN Storage SystemsCisco Networking

Certifications & Qualifications

Security+ CECASPCISSPDoD 8570 / 8140-03 Certification

Industry Keywords

NISPOM Chapter 8DCID 6/3-ICD 503RMFSTIGJAFANJSIG

Tech Stack

Tools & technologies

LinuxVMware

About the role

Key responsibilities & impact

Maintain smooth operation of multi-user computer systems
Coordinate with network, software, and systems engineers, desktop technicians, project managers, end users, and customer and IT management
Administer Windows/VMware and Linux/Redhat systems for a classified government contract
Analyze customer requirements and determine equipment and software requirements for automated-system solutions
Review and implement system enhancements, including installation, upgrades/patching, monitoring, problem resolution, and configuration management
Provide backup and recovery services
Manage file systems, disk space, and virus protection
Create and maintain user and computer accounts
Modify file permissions and security access lists
Test product releases for compatibility and minimized user impact
Develop and document technical processes and procedures
Troubleshoot issues with vendors and evaluate vendor products, services, and suggestions
Adhere to Information Systems security guidelines
Maintain security audit and logging information on classified networked and standalone computers as directed by the ISSM
Prepare security documentation for Computer Security
Report project status for recurring and non-recurring efforts
Independently determine and develop solution approaches

Requirements

What you’ll need

Bachelor’s degree and 5 years of related professional or military Systems Administration experience, OR Master’s degree and 3 years of experience, OR Associate degree and 8 years of experience, OR High School Diploma and 9 years of experience in lieu of degree, OR relevant certifications and 8 years of experience in lieu of degree
Current Security+ CE, or ability to obtain within 6 months of hire date
Experience managing Windows Server OS and domain architecture
Ability to support multiple networks, complete administration tasks, and direct others as necessary
Ability to lift equipment weighing up to 40 pounds
Ability to work after hours and weekends as needed
Ability to travel up to 50% of the time
Active US Government Top Secret Clearance, with a background investigation completed within the last 6 years or enrollment into Continuous Evaluation
U.S. Citizenship required for positions with a government clearance
Experience with NISPOM Chapter 8, DCID 6/3-ICD 503, RMF, STIG, JAFAN, or JSIG environments
Experience installing, configuring, and maintaining computer hardware in a networked environment
Server management experience
Currently valid Security+ CE, CASP, CISSP, or similar security certification
Windows domain architecture experience
Understanding of networking, including subnets, routing, and VLANs; Cisco experience and/or certification
Windows AD, LDAP, VMware, and SAN storage systems knowledge
Linux operating system experience and/or certification
VMware experience with current version
Rudimentary scripting experience
Experience creating and deploying system images in an enterprise environment
Experience with Certification & Accreditation process
DoD 8570 / 8140-03 certification in a primary OS (Windows, Linux, Cisco)
Ability to communicate effectively in written and oral format

Benefits

Comp & perks

Overtime eligibility
Shift differential eligibility
Discretionary bonus eligibility
Health insurance coverage
Life insurance
Disability insurance
Savings plan
Company-paid holidays
Paid time off (PTO) for vacation and/or personal business