Linux System Administrator Jobs (No ghost jobs, direct from employers)

Overview

i3 is seeking a Linux Systems Administrator to support an Army Contract. The Linux Systems Administrator will provide technical expertise supporting information system components, infrastructure integration and maintenance.

Responsibilities

• Administer and maintain Red Hat platforms, including daily operations such as Workstation monitoring, user management, resource allocation, patching, upgrades, and troubleshooting platform issues to minimize downtime.
• Perform advanced Linux (RHEL) system administration tasks, including installation, configuration, security hardening, performance tuning, backup/recovery, and log management.
• Develop and execute automation scripts and playbooks using Ansible and Ansible Automation Platform to automate repetitive administrative tasks, configuration management, deployments, and system maintenance on Linux environments.
• Support end users and application teams by resolving daily operational issues related to Linux systems, providing guidance, and ensuring smooth access and functionality.
• Document system configurations, operational procedures, runbooks, and troubleshooting guides with clear, detailed written communication to facilitate team knowledge sharing and compliance.
• Manage and support large storage units for consistent permissions and configuration management.
• Monitor system performance and health, respond to alerts and incidents, conduct root cause analysis, and apply fixes to maintain reliability, security, and compliance in regulated environments.
• Collaborate with users to resolve cross-team operational challenges.
• Stay up-to-date with Red Hat technologies, Linux best practices, automation tools, and container administration trends to improve operational efficiency.

Qualifications

• Bachelor's degree in Information Technology, Computer Science, or a related field (preferred); equivalent professional experience accepted.
• 5 Years of hands-on experience in systems administration, with strong emphasis on Linux/Red Hat and also Windows environments.
• Expertise in administering Red Hat Enterprise Linux, including troubleshooting, server operations, and supporting production workloads.
• Proficiency in Linux system administration (RHEL preferred) and scripting (e.g., Bash) for task automation.
• Solid experience with Ansible and Ansible Automation Platform for configuration management and automation.
• Strong written and verbal communication skills, with experience creating clear documentation, processes, and procedures.
• Ability to work effectively with end users, developers, and cross-functional teams to address operational needs.
• Active Secret Clearance Required.

Preferred Skills:

• Red Hat certifications (e.g., RHCSA, RHCE) and/or Linux + certification.
• Experience in defense or mission-critical IT operations with focus on security and compliance standards.
• Experience administration in Windows environments.

Knowledge/Skills

• Knowledge of office administration and procedures.
• Exceptional judgment capabilities and relationship management skills.
• Excellent communication, teamwork, and client service skills; ability to clearly communicate in discussions and written documents, and to deliver feedback clearly and tactfully.
• Interact with a diverse array of customers and staff in a professional and courteous manner.
• Work independently with accountability for accurate and complete results.
• Be extremely organized and exceptionally detail oriented.
• Work well both independently and in a team environment.
• Be energized by a fast-paced work environment.
• Must be able to communicate with others effectively.
• Analyze information and respond appropriately.
• Manage time wisely and prioritize tasks.
• Provide superior customer service.
• Multi-task in a pleasant manner.
• Work well under pressure.

PHYSICAL DEMANDS

• The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job.
• While performing the duties of this job, the employee is regularly required to talk or hear. The employee frequently is required to stand; walk; handle or feel; and reach with hands and arms.
• The employee is occasionally required to sit; climb or balance; and stoop, kneel, crouch or crawl. The employee must be able to lift and/or move up to 10 pounds and occasionally lift and/or move up to 25 pounds.
• Specific vision abilities required by this job include close vision, distance vision, peripheral vision, depth perception and ability to adjust focus.
• Regular i3 hours are 8:00 a.m. - 5:00 p.m. Monday-Friday, however, additional hours may be required on occasion. Regular and punctual attendance is required.

About i3

Founded in 2007, Integration Innovation, Inc. (i3) is headquartered in Huntsville, AL, with additional offices in Orlando, FL, and the National Capital Region. We are a 100% team member-owned mid-tier integrator with over 800 employee-owners, and our culture speaks for itself: we've earned ten Best Places to Work awards, driven by strong employee engagement, transparent leadership, and a genuine commitment to communication.

i3 team members operate at the leading edge of national defense across a broad range of technical disciplines, from systems and software engineering to modeling, simulation, and training solutions to cybersecurity, digital engineering, and enterprise IT. We also take products from prototype through production, bringing that same engineering rigor to manufacturing and delivering hardware at scale. For candidates, that means a rare opportunity: the innovation and mission focus of an engineering services company paired with the hands-on impact of building and delivering real solutions that benefit the Warfighter, all inside an employee-owned company where your contributions directly shape both the mission and your ownership stake in the business.