Linux System Administrator

Description

Location:
NAWS China Lake, CA

Security Clearance Requirement:
Top Secret

Telework Eligible? No, work will be performed on site at NAWS China Lake

What You’ll Do:

Support mission-critical Navy training systems at NAWS China Lake, CA!

As a Linux
System Administrator
, you will secure, sustain, and optimize complex DoD environments that directly enable warfighter readiness. This is a high-impact role for a technically strong professional who thrives in cybersecurity-focused, mission-driven operations.

Key Responsibilities:

• Ensuring secure and compliant Linux operating system configurations by applying Defense Information Systems Agency (DISA) Security Technical Implementation Guides (STIGs) to prevent misconfiguration and audit issues.
• Managing vulnerability assessments with Assured Compliance Assessment Solution (ACAS) and Evaluate STIG, producing accreditation artifacts to maintain Authorization to Operate (ATO) compliance and demonstrate security assurance.
• Maintaining and securing VMware ESXi hypervisors, including patching and hardening host systems to ensure platform reliability.
• Automating all routine administrative tasks — including provisioning, configuration management, patching, compliance checks, and reporting — using Red Hat Ansible Automation Platform, improving consistency and reducing manual error.
• Applying Red Hat Enterprise Linux (RHEL) updates on a monthly basis to maintain a secure, up-to-date environment.
• Refining processes to align with policy, reduce overhead, and collaborating with Dev Ops and security teams to support modern automation practices.
• Releasing RHEL hardened system templates on a quarterly basis with required documentation and ATO submission, ensuring standardized and compliant deployments.
• Monitoring Linux and ESXi environments for performance, availability, and security issues to sustain system health and resilience.
• Supporting Risk Management Framework (RMF) compliance (FISMA, NIST 800-53, DoD SRG), ensuring alignment with policy and accreditation requirements.
• Maintaining accurate technical documentation in Confluence and using Jira Software for task tracking, ensuring procedural clarity and reducing knowledge gaps.
• Operating and maintaining Solar Winds monitoring and auditing tools to proactively detect anomalies and maintain system integrity.

This description outlines the general nature and scope of the role. Additional duties may be assigned as necessary.

Requirements

What You’ll Bring:

• CompTIA Security+ is required
  . Bachelor's degree in Information Technology, Cybersecurity, Computer Science, or related area of study is required. In lieu of a bachelor's degree, 5 years of relevant experience may be accepted. The following certifications are highly desired:
  CompTIA Linux+, LPI Linux Essentials, Red Hat Certified System Administrator (RHCSA), etc.
• Candidates who do not currently hold an approved operating system certification must obtain one within 90 days of their hire date.
• 5 years of related system administration experience is preferred.
• Strong working knowledge of Linux is required.
• Experience managing DoD Host Based Security Systems (HBSS) is preferred.
• Demonstrated experience managing Domain Name System (DNS) performance and reliability.
• Proven experience implementing and maintaining local and group policies.
• Hands-on experience with Microsoft Active Directory (AD) domain controller servers for managing authentication, authorization, and network resources.
• Knowledge of log aggregation and analysis across multiple sources.
• Familiarity with Windows Power Shell is preferred.

Equally Important:

• Ability to build positive, collaborative relationships across teams and with external partners.
• Effective communicator with strong verbal and written skills.
• Proactive,…