Mid Level Linux Administrator

Overview

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

Candidates for this position must possess, at a minimum, the ability to obtain and maintain a United States SECRET level security clearance.

Responsibilities

• Build, configure, and maintain standardized Linux Operating Systems (such as RHEL 9) in various technical use cases.

• Build and maintain virtual machine Linux golden images from source code management.

• Integrate Linux operating systems with Active Directory environments utilizing tools such as SSSD.

• Maintain software repository mirrors utilizing Red Hat Satellite servers and custom scripts.

• Integrate multifactor authentication, CAC/smartcard PKI and certificate management in a mixed Windows/Linux environment.

• Work with teammates on an agile project with a focus on providing a secure, versatile, efficient, reproduceable, and highly scalable computing environment.

• Maintain system configurations with Infrastructure as Code (IaC) in git repositories.

• Perform Linux system configuration, patching, and vulnerability remediation utilizing Ansible, Terraform, Chef, GitLab, or other automation tools.

• Work with teammates to ensure satisfactory DevSecOps CI/CD pipeline operation on OpenShift clusters and other Linux systems.

• Deploy and maintain OpenShift cluster nodes on bare-metal and cloud infrastructure.

• Apply security controls as defined in DISA’s Security Technical implementation Guides (STIGs).

• Assist with implementation of Risk Management Framework (RMF) 2.0 Continuous monitoring tools and processes.

• Support periodic Independent Security Assessments (previously known as Security Control Assessor - Validation or SCA-V).

• Implement security configurations derived from zero-trust principles.

• Create, manage, and maintain network storage servers.

• Maintain and produce documentation in markdown and other formats as required.

• Assist Cybersecurity team with developing Risk Management Framework (RMF) accreditation documentation, SOPs, policies, and work instructions as needed.

• Continuously improve your skills and the project by researching, training on, assessing, and implementing new technologies and processes.

Qualifications

• Bachelor’s degree in Information Technology, Computer Science, or related field; or equivalent experience.

• 3–5 years of hands-on experience in Linux system administration in an enterprise or government environment.

• Must possess or obtain within six months a Linux computing environment training certificate in compliance with DoD 8140.

• Must have DoD 8140 IA Certification (Security+ CE).

• Current Secret clearance or the ability to obtain and maintain.

• Requires strong Linux (RHEL, CentOS) Operating System and troubleshooting skills.

• Working experience with Linux automation tools is a plus.

• Working experience with infrastructure as code and source code management is a plus.

• OpenShift or Kubernetes experience is a plus.

• Working knowledge of RMF, NIST 800-53, and other federal cybersecurity frameworks.

• Practical experience applying DISA STIGs and performing system hardening.

• Strong documentation, analytical, and problem-solving skills.

• Ability to work independently and manage multiple priorities in a dynamic environment.

• Prior experience supporting IT systems in a DoD or other government-regulated environment.

About i3

i3 is a technically diverse, 100% team member owned business, headquartered in Huntsville, Alabama specializing in missile and aviation systems engineering and logistic services, electronic warfare and electromagnetic effects analysis, UAS system integration and flight operations, full lifecycle C5ISR engineering services, cybersecurity and IT/IA innovative solutions and virtual training, simulation & serious game development and implementation. We have established a broad offering of products and capabilities collectively providing decades of experience supporting the full complement of DoD military services, Missile Defense Agency, National Aeronautics and Space Administration, and a variety of other Government organizations and private industry customers.

Perks of being a team member owner include:

• Long-term financial security

• Higher job satisfaction

• Greater job security

• Personal and professional growth

• Great company culture

Other outstanding benefits:

• Excellent insurance coverage

• 401(k) match

• Generous PTO

• Health and wellness incentives

• Tuition and certification reimbursement

• Countless opportunities to give back to the community through i3 Cares

We work hard. We compete hard. We play hard. Apply now to join us

Job LocationsUS-AL-Huntsville

ID 2025-4933

Business Unit ITCE

Type Full-Time

Clearance Secret Preferred