Cyber Infrastructure Systems Engineer

L3Harris Technologies

. Administer, configure, monitor, and troubleshoot Red Hat/CentOS Linux systems in secure, mission-focused environments .

Posted 9/29/2026full-timeMelbourne • Florida • United StatesSeniorLeadWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in administering and managing Red Hat/CentOS Linux systems and AWS GovCloud/C2S cloud infrastructure, with a strong focus on security compliance and system hardening. Proficient in vulnerability management and coordination with cybersecurity teams to ensure operational integrity in mission-focused environments.

Highest-signal resume keywords

Red Hat/CentOS Linux AdministrationAWS GovCloud/C2S ManagementDoD Security Standards ImplementationVulnerability Identification and RemediationTop Secret/SCI Clearance

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Linux System AdministrationAWS Cloud Infrastructure ManagementAutomation ToolsJBoss Services SupportVulnerability RemediationSystem HardeningTechnical DocumentationChange ManagementRMF ControlsAudit Readiness

Soft Skills

Coordination with Cybersecurity TeamsIncident Response

Tools & Technologies

Automation ToolsVirtualization TechnologiesPKIOAuthMicroservicesContainersDocker

Certifications & Qualifications

Top Secret/SCI ClearanceCCNA-SecuritySecurity+ CE

Industry Keywords

DoD 8570.01-M IAT Level 2STIGsPOA&M TrackingMission-Focused EnvironmentsClassified Environments

Tech Stack

Tools & technologies

AWSCloudCyber SecurityDockerLinuxMicroservices

About the role

Key responsibilities & impact

Administer, configure, monitor, and troubleshoot Red Hat/CentOS Linux systems in secure, mission-focused environments
Deploy and manage AWS GovCloud/C2S cloud infrastructure using automation tools and virtualization technologies
Operate as an AWS Cloud Systems Administrator supporting and maintaining JBoss-based services
Implement and sustain system hardening measures using DoD security standards, STIGs, and organizational cybersecurity policies
Perform vulnerability identification and remediation to support RMF controls, POA&M tracking, and audit readiness
Monitor system performance, availability, and operational health
Troubleshoot and resolve software, operating system, and access-related issues
Maintain system configurations, change records, and technical documentation
Coordinate with cybersecurity, network, and program teams on accreditation activities, incident response, and secure system operations
Travel locally from L3Harris to Patrick SFB (AFTAC) as needed

Requirements

What you’ll need

Bachelor’s Degree with a minimum of 4 years of relevant experience, or Graduate Degree with a minimum of 2 years of relevant experience, or in lieu of a degree, a minimum of 8 years of prior related experience
Top Secret/SCI Clearance
DoD 8570.01-M IAT Level 2 Required Professional Certifications: CCNA- Security, Security+ CE, or higher certification
Experience administering, configuring, monitoring, and troubleshooting Red Hat/CentOS Linux systems
Experience deploying and managing AWS GovCloud/C2S cloud infrastructure
Experience with automation tools and virtualization technologies
Experience supporting and maintaining JBoss-based services
Experience implementing DoD security standards, STIGs, and cybersecurity policies
Experience with vulnerability identification and remediation, RMF controls, POA&M tracking, and audit readiness
Ability to maintain system configurations, change records, and technical documentation
Ability to coordinate with cybersecurity, network, and program teams in classified or controlled environments
Experience with PKI and/or OAuth authentication models preferred
Experience integrating, securing, and administering cross-domain systems preferred
Experience integrating, securing, and administering microservices and containers such as Docker preferred

Benefits

Comp & perks

9/80 work schedule
Reasonable accommodation for individuals with disabilities