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# Senior Linux Systems Administrator

- **Company:** Brown Technologies Incorporated
- **Location:** Vicksburg, MS, United States (Remote available)
- **Experience:** Expert
- **Salary:** $100,000.0 - $150,000.0
- **Contract:** Permanent contract
- **Skills:** Active Directory, Apache HTTP Server, Apache Tomcat, Server Applications, Ubuntu (Operating System), Configuration Management, Software Documentation, Computer Networks, System Configuration, Linux, Disaster Recovery, Domain Name System (DNS), Monitoring of Systems, Lightweight Directory Access Protocols (LDAP), Linux System Administration, Linux Servers, Network Attached Storage (Server Appliance), Nginx, Performance Tuning, Public Key Infrastructure, Red Hat Enterprise Linux, Ansible, Smart Cards, TCP/IP, Virtual Local Area Networks, SSL Certificate Management, Data Logging, System Availability, Containerization, Kubernetes, Data Management, Docker
- **Published:** June 13, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=55b7fa4fd14d12dc

## About the Role

Do you have experience in TLS?, Do you have a Bachelor's degree?, * 6+ years of experience administering Linux systems (e.g., RHEL, Ubuntu) in an enterprise environment

 * 3+ years of experience implementing automation and configuration management (e.g., Ansible) in a production setting
 * 3+ years of experience administering enterprise web/application servers (e.g., NGINX, Apache, Tomcat)
 * Strong experience administering enterprise Linux environments in a production, high availability environment
 * Proficiency in Linux system configuration, patching, performance tuning, troubleshooting, and system hardening (STIG compliance)
 * Hands-on experience with containerization and orchestration platforms, including Kubernetes and Docker
 * Knowledge of SSL/TLS certificate management and integration with enterprise PKI environments
 * Experience supporting smart card (CAC/PIV) authentication and certificate-based access mechanisms
 * Working knowledge of identity and access integration (e.g., Active Directory, LDAP) in Linux environments
 * Solid understanding of enterprise storage and networking concepts (SAN/NAS, DNS, TCP/IP, VLANs)
 * Experience with system monitoring, logging, performance tuning, and troubleshooting across complex environments
 * Demonstrated experience supporting high availability, mission-critical systems in a production environment
 * Experience supporting systems in secure or regulated environments (e.g., DoD STIG compliance or similar)
 * Must meet DoD 8140 IAT Level II requirements, including an approved baseline certification (e.g., Security+); must possess or be able to obtain computing environment certifications relevant to Linux
 * Active U.S. Government Top Secret/SCI (TS/SCI) clearance required, or the ability to obtain and maintain a TS/SCI clearance with a favorable background investigation and eligibility for expedited processing, * Bachelor's degree from an accredited U.S. institution is strongly preferred; relevant experience may be considered in lieu of a degree

## Description

* Administer and maintain enterprise Linux server environments (e.g., RHEL, Ubuntu) in a high availability configuration
 * Manage system performance, resource utilization, and overall health across Linux-based infrastructure
 * Install, configure, harden, and maintain Linux operating systems in accordance with DoD STIG and security requirements
 * Perform system patching, updates, and lifecycle management for Linux servers and associated applications
 * Manage and support containerized environments, including Kubernetes clusters and Docker-based workloads
 * Develop and maintain automation solutions using Ansible (or similar tools) for configuration management and system provisioning
 * Administer and support web and application servers, including NGINX, Apache, and Tomcat
 * Manage SSL/TLS certificates, including issuance, renewal, and integration with enterprise PKI
 * Support and troubleshoot smart card (CAC/PIV) authentication and certificate-based access mechanisms
 * Support integration with enterprise services, including Active Directory, LDAP, and identity management systems
 * Troubleshoot and resolve issues across operating systems, applications, storage, networking, and container platforms
 * Implement and maintain backup, recovery, and disaster recovery solutions for Linux systems
 * Manage system logging, monitoring, and performance tuning using enterprise tools
 * Maintain system documentation, including configurations, procedures, and architecture diagrams
 * Provide Tier 2/3 support for Linux-related incidents and service requests
 * Plan and execute system upgrades, migrations, and expansions with minimal downtime


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