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Salary
≈ $109k – $212k per year (Estimated)
Location
In office (Greenville)
Seniority
Staff · 8+ years exp
Visa
H-1B filings in 12 months: 5

Confirmed on the employer's own hiring board on Oct 20, 2026. First seen by Alion on Sep 22, 2026. L3Harris Technologies scores A on the Alion truth index.

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L3Harris Technologies is an American defense contractor formed in 2019 by the merger of L3 Technologies and Harris Corporation. It builds tactical radios and military communication systems, electronic warfare and intelligence, surveillance and reconnaissance equipment, space sensors and satellites, night vision devices, and uncrewed surface vessels, and owns the rocket engine maker Aerojet Rocketdyne. Its main customers are the United States Department of Defense and allied governments. The company is headquartered in Melbourne, Florida, United States.

Job Title: Specialist, Information Security Systems Engineer

Job Code: 44711

Job Location: Greenville, TX

Schedule: 9/80 - Employees work 9 out of every 14 days - totaling 80 hours worked - and have every other Friday off

Job Description:

L3Harris is seeking a software engineer with a passion for cyber security. In this role, the selected candidate will design, develop, integrate, and maintain software applications that implement defensive cyber security capabilities. This includes supporting technologies and mechanisms such as multi-factor authentication, audit review, endpoint protection, encryption, vulnerability analysis, and security management.

The candidate will work closely with software developers, systems engineers, and commercial product vendors to design and evaluate secure systems, networks, and database solutions. This role is responsible for integrating multiple cyber security methods into a cohesive system security architecture and environment, while supporting the policies and procedures required to monitor and maintain that environment.

Essential Functions:

  • Design, develop, integrate, test, and maintain software applications that support defensive cyber security capabilities.
  • Be able to install, configure, use, and troubleshoot industry standard tools and technologies such as Splunk, Elastic, Tenable, NetApp Ontap Storage, Windows Active Directory, Redhat Linux Enterprise Server & Workstation, OpenShift, Kubernetes.
  • Proficient in a variety of scripting frameworks such as YAML, Java, Python, Ansible, Bash, SQL, PowerShell.
  • Proficient in CI/CD tools such as GitLab Enterprise with excellent software configuration management skills.
  • Collaborate with systems developers, software engineers, and commercial vendors in the evaluation and integration of secure products and technologies.
  • Support the design and assessment of secure systems, networks, and database products.
  • Integrate multiple cyber security controls into a unified and effective security architecture.

Qualifications:

  • Active US Top Secret/SCI security clearance, with continuous evaluation within the last 5 years.
  • Bachelor’s Degree and minimum 4 years of prior relevant experience.
  • Graduate Degree and a minimum of 2 years of prior related experience.
  • In lieu of a degree, a minimum of 8 years of prior related experience.
  • Demonstrated experience Designing, developing, integrating, testing, and maintaining software applications that support defensive cyber security capabilities.

Preferred Additional Skills

  • Experience assessing security and privacy controls in embedded systems using NIST 800-53.
  • Knowledge of ISR aircraft systems and subsystems.
  • Prior leadership experience with Agile methodologies (e.g., Scrum Master, Product Owner).
  • Experience with systems engineering standards and best practices.
  • Password management (Keepass, Ansible vaults, Kubernetes secret storage), SAST/DAST, container scanning.
  • C++
  • Tensorflow
  • VmWare Cloud Foundation
  • ETL Data pipelines
  • IDS/IPS
  • UAM
  • Security+
  • Experience in Risk Management Framework (RMF) accreditation and authorization (A&A) processes to include RMF steps 1-4 (categorization, controls selection, control implementation, security assessment) and standard body of evidence (BoE) package development.
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