Linux Systems Administrator
- Build, configure, and maintain standardized Linux operating systems (such as Red Hat Enterprise Linux 9) across multiple operational use cases.
- Create and maintain Linux virtual machine golden images using source code management and automation pipelines.
- Integrate Linux systems with Active Directory environments using technologies such as SSSD.
- Maintain software repository mirrors using Red Hat Satellite and custom Ansible automation.
- Implement multifactor authentication (MFA) solutions including CAC/Smartcard PKI authentication and certificate management in mixed Windows/Linux environments.
- Collaborate with team members in an Agile development environment to deliver secure, scalable, and reproducible infrastructure.
- Maintain system configurations using Infrastructure as Code (IaC) stored in Git repositories.
- Perform Linux system configuration, patching, and vulnerability remediation using automation tools such as Ansible, Terraform, Chef, or GitLab pipelines.
- Support DevSecOps CI/CD pipelines operating on OpenShift clusters and Linux systems.
- Deploy and maintain OpenShift cluster nodes on both bare-metal and cloud infrastructure.
- Apply system security configurations in accordance with DISA Security Technical Implementation Guides (STIGs).
- Assist with implementation of Risk Management Framework (RMF) 2.0 continuous monitoring processes and tools.
- Support Independent Security Assessments (ISA) and cybersecurity compliance activities.
- Implement system security configurations aligned with Zero Trust architecture principles.
- Deploy and maintain network storage servers supporting Linux environments.
- Create and maintain technical documentation using Markdown and other documentation formats.
- Assist cybersecurity personnel with RMF accreditation documentation, SOPs, policies, and operational procedures.
- Continuously improve system capabilities through research, evaluation, and implementation of new technologies and processes.
- Bachelor’s degree in Information Technology, Cybersecurity, Computer Science, Information Systems, Data Science, or related field with 6+ years of experience, or 10+ years of equivalent experience.
- Must meet DoD 8140 Intermediate System Administrator requirements (e.g., Security+, Cloud+, GICSP, SSCP, or GSEC).
- Must possess, or obtain, a Linux computing environment certification in compliance with DoD 8140.
- Willingness to obtain Linux+ certification within 6 months of hire if not already certified.
- Strong experience administering Linux operating systems (RHEL, CentOS, or equivalent).
- Experience troubleshooting and maintaining enterprise Linux environments.
- Familiarity with Linux automation tools such as Ansible, Terraform, or Chef.
- Experience with Infrastructure as Code and source code management (Git).
- Experience with OpenShift or Kubernetes environments preferred.
- Strong understanding of DoD cybersecurity practices and compliance frameworks (STIG, RMF).
- Ability to work independently and collaboratively in a team-oriented environment.
- Excellent customer service and communication skills.
- Active Secret Security Clearance preferred, or ability to obtain and maintain one.
- U.S. Citizenship required.
- 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.
- Communicate well listening, verbal, and written.
- 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.
- 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 800 a.m. - 500 p.m. Monday-Friday, however, additional hours may be required on occasion. Regular and punctual attendance is required.
- Long-term financial security
- Higher job satisfaction
- Greater job security
- Personal and professional growth
- Great company culture
- 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
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