Systems Administrator

Location:

Orlando, FL Salary:

Negotiable Description:

Senior Linux Systems Administrator (DoD / Security-Focused) Employment Type Full-Time Clearance Requirement Ability to obtain and maintain a U.S. Government Security Clearance U.S. Citizenship required Job Overview We are seeking a Senior Linux Systems Administrator to support and secure enterprise Linux environments in a Department of Defense (DoD)-regulated setting. This role is responsible for administering, hardening, and maintaining Linux-based infrastructure across physical and virtual environments while ensuring continuous compliance with cybersecurity frameworks such as RMF, STIGs, CMMC, and NIST . The ideal candidate has deep Linux systems experience, a strong security mindset, and the ability to automate and standardize system operations in high-availability environments. Responsibilities Configure, deploy, administer, and support Linux-based systems (Red Hat, Rocky, Ubuntu) across production and non-production environments Implement and maintain system hardening using STIGs and security baselines Identify, analyze, and remediate vulnerabilities uncovered through scans, audits, and compliance reviews Support Risk Management Framework (RMF) activities, including documentation and control implementation Automate system administration tasks using Ansible , scripting (Bash, Python), and centralized management tools Manage centralized Linux infrastructure using tools such as Red Hat Satellite, Foreman, or Ansible Integrate Linux systems with Windows Active Directory / LDAP for identity, authentication, and access control Assist with the installation and support of development and engineering tools Serve as a technical escalation point for Linux-related incidents, troubleshooting, and projects Produce and maintain detailed configuration, security, and maintenance documentation Participate in a modest-level 24x7 on-call rotation supporting mission-critical systems Required Qualifications 7+ years of Linux system administration experience in enterprise environments Strong expertise with Linux distributions (RHEL, Ubuntu, CentOS, Rocky, Amazon Linux) Hands-on experience with Linux system hardening , STIG implementation, and vulnerability remediation Experience with Ansible for configuration management and automation Experience integrating Linux systems with Active Directory / LDAP Familiarity with RMF and compliance-driven environments Proficiency in Bash and/or Python scripting Experience managing systems in virtualized environments DoD 8140-compliant certification (or ability to obtain) Bachelor's degree in Computer Science, Computer Engineering, or related field (or equivalent experience) Preferred Qualifications Experience supporting systems in AWS environments Experience working with ESS (Enterprise Support Services) Knowledge of and experience with NIST 800-53 and

NIST 800-171

Understanding of the Cybersecurity Maturity Model Certification (CMMC) and CUI handling requirements Prior experience in DoD, federal government, or defense contractor environments

Required Technical Skills Must Have:

Ansible Linux (RHEL, Ubuntu, CentOS/Rocky/Amazon Linux) STIGs

RMF CMMC

Nice to

Have:

AWS Additional Information This position supports secure, mission-critical systems in a regulated environment. Candidates must be comfortable working within strict compliance frameworks and collaborating with security, engineering, and operations teams. By providing your phone number, you consent to: (1) receive automated text messages and calls from the Judge Group, Inc. and its affiliates (collectively "Judge") to such phone number regarding job opportunities, your job application, and for other related purposes. Message & data rates apply and message frequency may vary. Consistent with Judge's Privacy Policy, information obtained from your consent will not be shared with third parties for marketing/promotional purposes. Reply STOP to opt out of receiving telephone calls and text messages from Judge and HELP for help.

Contact:

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