Lead, Systems Administrator

L3Harris Technologies•June Park, FL

4d•Hybrid

About The Position

We are seeking a skilled and experienced Cyber Infrastructure Systems Engineer (Systems Administrator) to join our Melbourne, Florida team. The role requires a highly skilled technical professional with a TS/SCI clearance and a strong foundation in cybersecurity, cloud engineering, and systems administration. The individual serves as a key contributor in the design, deployment, and sustainment of complex mission systems running in AWS GovCloud and C2S environments. With hands-on experience configuring, monitoring, maintaining, and troubleshooting Red Hat and CentOS Linux systems, this engineer brings both operational expertise and a developer’s mindset to automation, optimization, and problem-solving.

Requirements

Bachelor’s Degree and minimum 9 years of prior relevant experience. Graduate Degree and a minimum of 7 years of prior related experience. In lieu of a degree, minimum of 13 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

Nice To Haves

Experience with PKI and/or OAuth authentication models.
Experience Integrating, securing, and administering cross-domain systems.
Experience Integrating, securing, and administering microservices, containers (i.e., docker)

Responsibilities

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