Level 3 Communications, Inc

Specialist, Systems Administrator

Level 3 Communications, Inc • $88K — $105K *
Technical Services
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's Degree with 4 years relevant experience, or a Graduate Degree with 2 years experience, or 8 years of prior related experience without a degree.
  • Top Secret/SCI Clearance required.
  • DoD 8570.01-M IAT Level 2 certification required: CCNA-Security, Security+ CE, or higher certification.
  • Strong foundation in cybersecurity and systems administration.
  • Hands-on experience with Red Hat and CentOS Linux systems.

Responsibilities

  • Administer, configure, monitor, and troubleshoot Red Hat/CentOS Linux systems.
  • Deploy and manage AWS GovCloud/C2S cloud infrastructure with automation tools.
  • Act as an AWS Cloud Systems Administrator supporting JBoss-based services.
  • Implement system hardening measures using DoD security standards.
  • Perform vulnerability identification and remediation activities.
  • Monitor system performance and operational health.
  • Troubleshoot software, OS, and access-related issues while adhering to security procedures.

Benefits

  • 9/80 work schedule allowing every other Friday off.
  • Opportunities for local travel to Patrick SFB as needed.
  • Exposure to cutting-edge technologies in cloud engineering and cybersecurity.
Full Job Description
Job Title: Systems Administrator

Job Code: 45369

Job Location: Melbourne, FL or Patrick SFB

Job Schedule: 9/80 - Employees work 9 out of every 14 days - totaling 80 hours worked (Every Other Friday Off)

Job Description:

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.

Essential Functions:

  • 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.


Qualifications:

  • 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


Preferred Additional Skills:

  • 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)


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