Senior Linux Administrator

Overview

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. Candidates for this position must possess, at a minimum, 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, Cybersecurity, Data Science, Information Systems, Computer Science, or a related technical field. Additional experience may substitute for degree.
• 12-17 years of relevant 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 either possess or obtain a Linux computing environment training certificate in compliance with DoD 8140. Must be willing to attain Linux+ certification within 6 months.
• 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.
• 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.
• Secret Security clearance required.
• U.S. citizenship is required.

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 perf