System Administrator - ONI

Tenax Technologies LLC

$92K — $110K *
Aerospace & Defense
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • U.S. Citizen with Active Top Secret (TS) clearance eligible for TS/SCI
  • Current DoD 8570/8140 IAT Level II or III certification required
  • Minimum 3 years' experience in systems and networks administration
  • Experience with Linux (RHEL, Ubuntu) and Windows environments
  • Background in managing AWS cloud infrastructures
  • Knowledge of patch management and configuration management
  • Expertise in implementing DISA STIGs and cybersecurity protocols

Responsibilities

  • Administer Windows, Linux, and UNIX-based servers
  • Manage AWS cloud infrastructure and services
  • Monitor and troubleshoot system performance issues
  • Apply security patches and ensure system hardening
  • Support system modernization and cloud initiatives
  • Guarantee compliance with cybersecurity standards
  • Document technical processes and support maintenance activities

Benefits

  • Opportunities for professional development and certifications
  • Health, dental, and vision insurance plans
  • 401(k) retirement plan with company matching
  • Paid time off and flexible work arrangements
  • Employee assistance programs and wellness initiatives
Full Job Description
About the Role

TENAX Technologies is seeking a Systems Administrator to support mission-critical Navy programs in the Washington, DC area. The selected candidate will administer, maintain, and secure enterprise infrastructure across on-premises, hybrid, and AWS cloud environments. This position supports critical systems and applications that enable Department of Defense (DoD) and Intelligence Community (IC) missions.

Responsibilities
  • Administer and maintain Windows, Linux, and UNIX-based servers and enterprise systems.
  • Manage AWS cloud infrastructure, services, networking, and security.
  • Monitor system performance, perform troubleshooting, and resolve server, storage, network, and application issues.
  • Implement security patches, system hardening, and DISA STIG compliance.
  • Support system modernization, migrations, upgrades, and cloud initiatives.
  • Ensure system availability, integrity, confidentiality, and compliance with cybersecurity requirements.
  • Maintain technical documentation and support operational and maintenance activities.

Required Qualifications
  • U.S. Citizen.
  • Active Top Secret (TS) clearance with eligibility for TS/SCI.
  • Current DoD 8570/8140 IAT Level II or IAT Level III certification (Security+, CySA+, SSCP, CND, GSEC, CISSP, CASP+/SecurityX, GCIH, or equivalent).
  • Minimum 3 years of experience administering enterprise systems and networks.
  • Experience supporting Linux (RHEL, Ubuntu, or similar) and Windows environments.
  • Experience administering and supporting AWS cloud environments.
  • Experience with system monitoring, patch management, configuration management, and performance tuning.
  • Experience implementing DISA STIGs and cybersecurity compliance requirements.
  • Strong troubleshooting skills across servers, networks, storage, and applications.

Preferred Qualifications
  • Bachelor's degree in Computer Science, Information Technology, Systems Engineering, or related field.
  • 5+ years of Systems Administration and/or Network Administration experience.
  • AWS certification (Cloud Practitioner, Solutions Architect, SysOps Administrator, or equivalent).
  • Linux certification (RHCSA, RHCE, Linux+, or equivalent).
  • CCNP or equivalent networking certification.
  • Experience supporting DoD, Navy, Intelligence Community, or Federal Government environments.
  • Knowledge of virtualization, enterprise storage, backup and recovery solutions, and hybrid cloud architectures.

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