Senior Linux Systems Administrator

About the position

i3 is seeking a Senior Linux Systems Administrator to support an Army Contract. The Senior Linux Systems Administrator will provide technical expertise supporting information system components, infrastructure integration and maintenance to satisfy architectural and business requirements in support of customer labs. The Senior Linux Systems Administrator must have a customer centric approach and provide all levels of support for the user base community. Candidates for this position must possess, at a minimum, a United States SECRET level security clearance.

Responsibilities

• Provide direct customer service and technical support to local and remote users as required via phone, e-mail, on-line systems, and in person.
• 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 customers and infrastructure team 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.
• 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.
• 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.

Requirements

• Bachelor's degree in Information Technology, Cybersecurity, Data Science, Information Systems, or Computer Science and 6 years' experience or 10+ years equivalent experience.
• Must meet DoD 8140 Intermediate System Administrator qualifications, such as holding a Security+, Cloud+, GICSP, SSCP, or GSEC certification (or higher-level applicable certification).
• Must have a Linux+ certification, equivalent, or higher-level Linux computing environment certification.
• Ability to work with little or no direct supervision and in a team environment.
• Must have excellent customer service skills.
• Requires strong Linux (RHEL, CentOS) Operating System and troubleshooting skills.
• Strong DoD Security practices and knowledge.

Nice-to-haves

• 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.
• AWS, Azure, or GCP cloud computing experience is a plus.

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