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Added 6 hours ago
TA
MEO Missile Warning & Tracking (MWT) SEIT Engineer
The Aerospace Corpor
Colorado Springs, CO
- $117,300 to $175,900 USD / year
…innovative solutions that span satellite, launch, ground, and cyber systems for defense, civil and commercial customers. When you join our team, you'll be part of a special collection of…
Added 6 hours ago
TA
MEO Missile Warning & Tracking (MWT) Lead SEIT Engineer
The Aerospace Corpor
Colorado Springs, CO
- $151,300 to $226,900 USD / year
…innovative solutions that span satellite, launch, ground, and cyber systems for defense, civil and commercial customers. When you join our team, you'll be part of a special collection of…
Added 7 hours ago
Manufacturing Engineer 2 - Unmanned Underwater Vehicles (UUV) 31057
HII
Pocasset, MA
The Manufacturing Engineer II supports the development, documentation, and execution of manufacturing processes for Unmanned Underwater Vehicles (UUVs) in a defense contracting environment.…
Added 13 hours ago
Tier 3 Ground Terminal (GT)/ IT Engineer- Junior, Intermediate and Senior Level- TS/SCI with Polygraph
GD Information Technology, Inc.
United States
Transform technology into opportunity as the Tier 3 Ground Terminal (GT) / IT Engineer provides support for the sustainment of satellite GT antenna, Radio Frequency (RF), communications,…
Added 16 hours ago
ST
Senior Software Engineer (Ansible Automation)
Sealing Technologies, a Parsons Company
Columbia, MD
- $127,000 to $157,000 USD / year
You will be engineering a complex automation framework, written primarily in Ansible and Python, that deploys Defensive Cyber Operations (DCO) hunt kits to physical hardware. You will…
Added 18 hours ago
Cyber Reverse Engineer
Peraton
Aberdeen Proving Ground, MD
Responsibilities:As a Reverse Engineer, you'll contribute to a team that works hands on with state-of-the-art UAS electronics and systems. With your technical skills and learner's mindset,…
Added 19 hours ago
Spacecraft Thermal Engineer
The Aerospace Corporation
El Segundo, CA · Chantilly, VA
…innovative solutions that span satellite, launch, ground, and cyber systems for defense, civil and commercial customers. When you join our team, you’ll be part of a special collection of…
Added 19 hours ago
MEO Missile Warning & Tracking (MWT) SEIT Engineer
The Aerospace Corporation
El Segundo, CA · Aurora, CO · Colorado Springs, CO
…innovative solutions that span satellite, launch, ground, and cyber systems for defense, civil and commercial customers. When you join our team, you’ll be part of a special collection of…
Added 19 hours ago
MEO Missile Warning & Tracking (MWT) Lead SEIT Engineer
The Aerospace Corporation
El Segundo, CA · Aurora, CO · Colorado Springs, CO
…innovative solutions that span satellite, launch, ground, and cyber systems for defense, civil and commercial customers. When you join our team, you’ll be part of a special collection of…
Added 19 hours ago
Kubernetes Engineer
The Aerospace Corporation
El Segundo, CA · Chantilly, VA
…innovative solutions that span satellite, launch, ground, and cyber systems for defense, civil and commercial customers. When you join our team, you’ll be part of a special collection of…
Added 19 hours ago
Cyber Engineer
PeopleTec, Inc.
Huntsville, AL
We are seeking a cyber engineer interested in joining an award-winning company and working with cutting-edge missile defense modeling and simulation technologies. The selected candidate…
Added 22 hours ago
Nuclear Mechanical Engineer 2 - 31050
Huntington Ingalls Industries
Newport News, VA
…operational readiness of the Fleet. As an Nuclear Mechanical Engineer 2, you will contribute to complex overhaul and modernization initiatives by developing engineering solutions, preparing…
Added 22 hours ago
Nuclear Engineer 2 - 31046
Huntington Ingalls Industries
Newport News, VA
…fleet. With a holistic approach to life-cycle maritime defense systems - from small watercraft to submarines, surface combatants and aircraft carriers - HII ensures a high state of…
Added 1 day ago
Specialist, Systems Engineer (L3) 1
L3Harris
Salt Lake City, UT
Support the Program Manager and Program Engineer with Systems level technical support
Added 1 day ago
Specialist, Systems Engineer - RC-135 Computer Systems Administrator
L3Harris
Offutt Air Force Base, NE
Job Title: Specialist, Systems Engineer - RC-135 Computer Systems Administrator
Added 1 day ago
Manufacturing Engineer 2 - Unmanned Underwater Vehicles (UUV) 31057
Huntington Ingalls Industries
Pocasset, MA
The Manufacturing Engineer II supports the development, documentation, and execution of manufacturing processes for Unmanned Underwater Vehicles (UUVs) in a defense contracting environment.…
Added 1 day ago
INTERDISCIPLINARY ENGINEER
Strategic Systems Programs Office
Pittsfield, MA
…technical expertise to SPSP regarding Information Assurance/Cyber Security (IA/CS) You will be responsible for the design development, installation and operational support of COTs based…
Added 1 day ago
Embedded Software Test Engineer
Leidos
Huntsville, AL
Leidos is seeking a talented Embedded Software Test Engineer to join a multi-disciplinary team within a matrixed organization to create unique solutions for complex problems, specifically…
Added 1 day ago
Sr. Systems Engineer - EADGE-T
Lockheed Martin
Virtual Three, CO
The Tech Refresh will focus on Foundational / Cyber Security Enhancements. Join us and become a part of the team that is actively designing and developing the updated baseline and get the…
Added 1 day ago
Staff Full Stack Engineer (Infrastructure) - FT telework - EADGE-T
Lockheed Martin
Colorado Springs, CO
EADGE-T is seeking a full stack engineer to join the project team with a focus as an Infrastructure Systems Engineer. In this role, you will:
Added 1 day ago
Staff Systems Engineer - ExPat
Lockheed Martin
Colorado Springs, CO
The Tech Refresh will focus on Foundational / Cyber Security Enhancements. Join us and become a part of the team that is actively designing and developing the updated baseline and get the…
Added 1 day ago
RHEL - Sr. Full Stack Engineer - FT Telework
Lockheed Martin
Colorado Springs, CO
EADGE-T is seeking a full stack engineer to join the project team as an infrastructure engineer with a focus on RedHat Enterprise Linux Systems. In this role, you will:
Added 1 day ago
O
Lead Software Engineer - City
OKC
OKLAHOMA CITY, OK · Oklahoma City, OK
- $39.52 to $60.39 USD / hour
The Lead Software Engineer is responsible for being a lead technical resource on a team of software engineers and developers and ensuring the successful delivery of high-quality software…
Added 1 day ago
R&D Engineer 2/3
Los Alamos National Laboratory
Los Alamos, NM
This position will be filled at either the R&D Engineer 2 or 3 level, depending on the skills of the selected candidate. Additional job responsibilities (outlined below) will be assigned if…
Added 1 day ago
R&D Engineer 3/4
Los Alamos National Laboratory
Los Alamos, NM
In addition to what was outlined at the lower level, at this level the job assignments at the level 4 will have greater complexity and consequences. In addition, R&D Engineer 4's will serve…

L3Harris

Senior Specialist, System Administrator (TS/SCI Needed)

Melbourne, FL, United States

In compliance with pay transparency requirements, the salary range for this role in Florida 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 Florida 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: Sr. 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 Melbounre, FL 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 Florida 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 11/30/2026.

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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More about this job

Skills

System administration
AWS
Microsoft Windows
Linux
Risk management
Cloud technologies
Troubleshoot
Monitor system performance
CCNA
Security+
Jenkins
GitLab
CI/CD
Regulatory compliance

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