Linux System Administrator

Na Ali'i Consulting & Sales, LLC.•Fort Knox, KY

2h•Onsite

About The Position

Nakupuna Companies is seeking a highly skilled Linux System Administrator to support the U.S. Army Human Resources Command (HRC). This role is vital for maintaining, securing, and optimizing mission-critical systems that underpin Army-wide personnel operations. The ideal candidate will collaborate closely with other system administrators, software developers, cybersecurity teams, and network engineers to ensure high availability, optimal performance, and robust reliability across enterprise applications and infrastructure.

Requirements

Experience in one or more of the following areas is highly beneficial: Operating Systems: Linux Administration (Primary Focus), Windows Server
Virtualization & Infrastructure: VMware, Citrix, Nutanix
Log Management & Message Brokers: ESB, ELK Stack
Web Services: Enterprise Web Services & Middleware Platforms
Strong self-motivation, meticulous attention to detail, and exceptional written and verbal communication skills.
Certifications aligned with DoDD 8140 / DoD 8570 (e.g., Security+ CE, Network+ CE, CASP+ CE) may be required.
3+ years of direct, hands-on experience in enterprise Linux system administration.
Bachelor’s degree in Computer Science, Information Systems, Engineering, or a related field; equivalent professional experience will also be considered.
Must be a U.S. Citizen.
Must be able to obtain and maintain an active Secret security clearance.

Responsibilities

Install, configure, secure, and maintain enterprise Linux servers supporting critical web services.
Perform system patching, updates, configuration management, and baseline security enforcement.
Manage user accounts, permissions, and security controls in strict alignment with DoD and Army policies.
Proactively monitor system performance, capacity, and resource utilization to identify and resolve potential issues before they impact operations.
Automate routine operational tasks using Bash, Python, Ansible, or standard configuration management tools.
Install, configure, and maintain robust web and application servers, including Apache, NGINX, Tomcat, WebLogic, WebSphere, or IIS.
Support the deployment, hosting, and continuous lifecycle management of web-based applications.
Manage SSL/TLS certificates, DNS entries, and domain configurations to ensure secure and seamless operations.
Maintain and optimize web application uptime, backend service reliability, and delivery performance.
Diagnose and resolve complex issues involving Linux systems, middleware, authentication services, and key integration points.
Provide Tier II and Tier III support for critical incidents affecting web services, content delivery, and system connectivity.
Partner with network and cybersecurity teams to investigate and resolve issues related to performance, security, or access controls.
Apply DoD security hardening standards, perform vulnerability remediation, and ensure alignment with cybersecurity mandates.
Maintain strict compliance with NIST, Risk Management Framework (RMF), FISMA, and Army security guidelines.
Support continuous log monitoring, security audits, and comprehensive incident response activities.
Create and maintain precise documentation for system configurations, logical architectures, Standard Operating Procedures (SOPs), and operational workflows.
Identify and recommend strategic improvements in automated processes, infrastructure monitoring, and overall system reliability.
Stay current with emerging technologies, methodologies, and tools relevant to Linux systems and enterprise hosting environments.