Jobs in the United States

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Added 17 mins ago
Principal Platform Engineer ADMS
National Grid USA Service Company, Inc.
LIVERPOOL, NY
…our customers in the dark. So, join us as Principal Platform Engineer - ADMS, and find your superpower. We need you!We want to find an innovative, adaptable, and results-oriented Principal…
Added 19 mins ago
Lead Engineer I, System & Infrastructure Administrator (Red Hat Linux & Solaris)
KPMG LLP
ROCHESTER, NY
…future as we are, join our team.KPMG is currently seeking a Lead Engineer, System & Infrastructure Administrator (Red Hat Linux & Solaris) to join our Digital Nexus technology…
Added 1 hour ago
Big Data Systems Engineer
Trinzic
Huntsville, AL
KBR is seeking a Big Data Systems Engineer to join our team. The successful candidate will be part of the KBR team supporting the Test Resource Management Center’s (TRMC) Big Data (BD) and…
Added 3 hours ago
Senior Advanced Manufacturing Engineer – Test
Haier US Appliance Solutions, Inc.
Louisville, KY
Working knowledge of operating systems such as Windows and Linux, software programming fundamentals, and distributed system concepts such as server/client architecture, pub/sub, security,…
Added 6 hours ago
Senior Staff Engineer - Agentic Identity
Cisco Systems, Inc.
Remote, United States
Deep technical expertise developing multi-threaded, high-throughput server-side applications in Go, C/C++, or Java on Linux.
Added 6 hours ago
Cloud Engineer
Cisco Systems, Inc.
RTP, NC
Experience in building, operating, tuning, and debugging Linux and Windows Server environments for high availability and performance.
Added 6 hours ago
Network Engineer - Skillbridge
Viasat, Inc.
Remote - Florida, FL
…and switches, Palo Alto PAN-OS firewalls, Red Hat Enterprise Linux (shell, systemd, SELinux, auditd), Windows Server and Windows 11 (Group Policy, local policy, PowerShell), PostgreSQL and…
Added 8 hours ago
ITS Support Engineer I, Amazon IT Services
Amazon
Tempe, AZ
2+ years of corporate setting Windows, Mac or Linux Operating systems support experience
Added 8 hours ago
Senior Electrical Product Development Engineer
NVIDIA USA
Remote, United States
Collaborating with your peers across various engineering groups, you will optimally launch new systems for NVIDIA HGX GPU Accelerated Server Platforms to production. These purpose-built…
Added 10 hours ago
C
Principal Security Engineer
Citizens
Johnston, RI
- $142,000 to $186,000 USD / year
· Experience with the Linux and Windows Server operating systems
Added 10 hours ago
IT Infrastructure Field Engineer Level 5
Northrop Grumman
Honolulu
Experience with Windows Server, Windows workstation environments, and Linux system administration
Added 11 hours ago
Big Data Systems Engineer
KBR Wyle Services, LLC
Niceville, FL · Tampa, FL · Los Angeles, CA · Huntsville, AL · Denver, CO · Washington, DC
KBR is seeking a Big Data Systems Engineer to join our team. The successful candidate will be part of the KBR team supporting the Test Resource Management Center’s (TRMC) Big Data (BD) and…
Added 11 hours ago
Data Engineer
KBR Wyle Services, LLC
Camarillo, CA
As a Data Engineer, you will be a critical part of the team that is responsible for enabling the development of data-driven decision analysis products through the innovative application,…
Added 11 hours ago
SU
Service Innovation & Development Engineer
Sungrow USA Corporation
Houston, TX
- $75,000 to $105,000 USD / year
The Service Innovation & Development Engineer is a hybrid position based in the Sungrow Houston, TX office, reporting to the Service AI Agent product owner within the Strategic Expert team.…
Added 11 hours ago
Engineer III - Network
HonorHealth Support Services
2502 W Utopia Rd Phoenix, AZ
…Developing large-scale, distributed, semantically interoperable systems, network architecture modeling techniques meeting development specifications. Design & development in interfaces and…
Added 11 hours ago
IA
Software Solutions Engineer I
Inductive Automation LLC
On-Site: Columbia, MD
- $82,000 to $95,000 USD / year
…industrial software that can't go down. As a Software Solutions Engineer I, you'll be the person customers call when something breaks, working through root causes with them in real…
Added 12 hours ago
ESX Engineer
VMware LLC
Promontory B, CA
Strong understanding of kernel-level OS architectures such as Linux, Unix, Solaris, BSD-like systems, embedded real-time Operating Systems.
Added 12 hours ago
Test & Validation Integration Engineer
Quantum Sky
Chantilly, VA
Quantum Sky is searching for a Test & Validation Integration Engineer to support an Intel customer in Chantilly, VA The Test & Validation Integration Engineer serves as the critical bridge…
Added 13 hours ago
T
Mid-level Enterprise Systems Engineer
TEKsystems
Mason, MI
- $45 to $55 USD / hour
Plan, design, test, implement, troubleshoot enterprise server and storage systems
Added 13 hours ago
DevSecOps Engineer/Administrator
Parsons Technical Services, Inc.
CO
Parsons is looking for a sharp DevSecOps Engineer/Administrator to join our growing team!
Added 13 hours ago
Linux Systems Administrator - Junior
Parsons Technical Services, Inc.
VA
Are you an aspiring Linux Systems Engineer looking to build your career while supporting mission-critical systems in a dynamic environment? Parsons is seeking a Junior Linux Systems…
Added 13 hours ago
DT
Network Engineer - IT
Donato Technologies Inc
Grapevine, TX
- $60,000 to $65,000 USD / year
Requires continuous monitoring of company’s systems.
Added 13 hours ago
DT
Engineer - AI Server Test
Donato Technologies Inc
Grapevine, TX
- $60,000 to $65,000 USD / year
The AI Server Test Engineer will establish test procedures and coordinate testing of products under development or in production
Added 13 hours ago
A
DevSecOps Engineer
Actalent
Huntsville, AL
- $120,000 to $160,000 USD / year
Administer and maintain Linux-based systems in production environments.
Added 13 hours ago
Z
Test Infrastructure Engineer
Zoox
Foster City, CA
- $183,000 to $220,000 USD / year
Experience with Linux system administration and server management

L3Harris

Senior, System Administrator (TS/SCI Needed)

Melbourne, FL, United States

In compliance with pay transparency requirements, the salary range for this role in Colorado state is $92,500-$171,500.

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Job details

Pay: In compliance with pay transparency requirements, the salary range for this role in Colorado state is $92,500-$171,500.
Posting language: English
Posted: Aug 20, 2026

Original job description

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Title: Specialist, Cyber Infrastructure Systems Engineer (System Administration)

Job Code: 42971

Job Location: Melbourne, FL

Job Schedule: Standard 5/8

Job Description:

We are seeking a skilled and experienced Cyber Infrastrastructure Systems Engineer (CISE) to join our Colorado Springs, CO team. The ideal candidate will have system administration expertise in Amazon Web Service (AWS) Amazon Machine Images (AMI), managing and optimizing Windows and Linux systems, as well as virtual infrastructures. This role requires a hands-on professional with a robust understanding of security and risk management, and system monitoring. The candidate must have a proven track record of designing and implementing solutions that comply with security policies, maintaining a secure and resilient IT environment.

Essential Functions:

Utilize cloud technologies such as Amazon Web Service (AWS) Amazon Machine Images (AMI)
Installation of monitoring agents, STIGing, and Hardening AWS AMIs
Update Packer configurations and scripts to facilitate AWS AMI STIG/Hardening and installation of custom tools such as Viper.
Development of an automated patching methodology using AWS System’s Manager.
System Administration experience with AWS Elastic Compute Cloude (EC2)
Configure, monitor, maintain, and troubleshoot Red Hat Linux systems.
Manage and maintain Windows systems to ensure their optimal performance and reliability.
Ensure the smooth operation and maintenance of server systems and network infrastructure to support business continuity and performance.
Monitor system performance and resource usage, identify potential problems, and implement solutions to maintain system resilience and security.

Qualifications:

Bachelor’s Degree with a minimum of 6 years of relevant experience, or Graduate Degree with a minimum of 4 years of relevant experience, or in lieu of a degree, a minimum of 10 years of prior related experience.
Clearance: Top Secret/Sensitive Compartmented Information (TS/SCI)
DoD 8570.01-M IAT Level 2 Required Professional Certifications: CCNA- Security, Security+ CE, or higher certification

Preferred Additional Skills:

Experience working with Jenkins and Gitlab Runner
Experience working with continuous integration, build management, and automated test frameworks.
Experience utilizing virtualization technologies and backup solutions.
Experience in a dynamic, fast-paced, team-oriented environment.

In compliance with pay transparency requirements, the salary range for this role in Colorado state is $92,500-$171,500. 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.

The application window for this position will close on 10/1/2026.

L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.

Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.

By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions.

L3Harris Technologies is an E-Verify Employer. Please click here for the E-Verify Poster in English (https://www.e-verify.gov/sites/default/files/everify/posters/EVerifyParticipationPoster.pdf) or Spanish (https://www.e-verify.gov/sites/default/files/everify/posters/EVerifyParticipationPoster.pdf) . For information regarding your Right To Work, please click here for English (https://www.eeoc.gov/sites/default/files/2022-10/22-088_EEOC_KnowYourRights_10_20.pdf) or Spanish (https://www.eeoc.gov/sites/default/files/2022-10/22-088_EEOC_KnowYourRightsSp_10_20.pdf) .

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