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. Minimum of 3 years of hands-on experience in Linux system administration in an enterprise or government environment. Must possess a Linux+ in compliance with DoD 8140. Must possess a Sec+ CE in compliance with DoD 8140. Active Secret security clearance required. 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. Ansible Automated Platform (AAP) experience a plus. Redhat Satellite Server experience is desired. 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. 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 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!