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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Linux System Administrator - **Company:** Intersources Inc. - **Location:** Houston, TX, United States - **Experience:** Expert - **Contract:** Temporary to permanent - **Skills:** Artificial Intelligence, Data Analysis, Microsoft Azure, Bash Shell, Ubuntu (Operating System), Cloud Computing, CompTIA Security+, Cyber Security, Information Systems, Continuous Delivery, Continuous Integration, Cron, Linux, DevOps, File Systems, GNU Compiler Collection, Identity and Access Management, Internet Security, Information Systems Security Architecture Professional, Key Management, Linux System Administration, Linux Security Modules, Logical Volume Manager, Microsoft Software, Windows PowerShell, Red Hat Enterprise Linux, Service Pack, Software Engineering, Virtual Machines, Data Logging, Transport Layer Security, Information Technology, Data Management, Docker, Key Vault - **Published:** September 17, 2026 - **Apply:** https://www.careerbuilder.com/job-details/senior-linux-system-administrator-houston-tx--64e1f6bf-d6c2-4b91-a6ce-d9ef7e995bef ## About the Role The ideal candidate will have strong Linux administration experience combined with hands-on knowledge of Azure, Azure DevOps, Docker, security hardening, automation, and identity management., * 8+ years of hands-on Linux system administration experience in enterprise or government environments. * Strong expertise with current Ubuntu Server LTS releases and RHEL. * Experience administering Linux VMs in Microsoft Azure. * Knowledge of Azure networking, managed identities, and Key Vault. * Hands-on experience with Azure DevOps, repositories, pipelines, and CI/CD. * Experience with Docker on Linux, including container secrets management. * Advanced Bash scripting and working knowledge of PowerShell. * Strong knowledge of UFW, SSH hardening, AppArmor, and SSL/TLS certificates. * Experience with systemd, /etc/sysctl.conf, PAM, auditd, and log rotation. * Ability to work independently within a small, cross-functional IT/security team. Preferred Qualifications * Ubuntu/Canonical certifications, CISSP, or CompTIA Security+. * AZ-900 and/or AZ-104 certification. * Healthcare or public-sector IT experience. * Familiarity with MARS-E, HIPAA technical safeguards, or CMS security requirements. * Experience supporting development infrastructure with rapidly changing workloads., Administrative Skills, Artificial Intelligence (AI), Automation, Bash Scripting, CISSP - Certified Information Systems Security Professional, Cloud Computing, CompTIA Security+, Computer Security, Content Management Systems (CMS), Continuous Deployment/Delivery, Continuous Integration, Cron Job Scheduling, Cross-Functional, Customer Experience, Data Analysis, DevOps, Digital Certificates, Docker, Emerging Technology, File Systems, GNU C Compiler, Government, HIPAA (Health Insurance Portability and Accountability Act), Identify Issues, Identity Data Management, Information Technology & Information Systems, Internet Security, Linux Administration, Linux Operating System, Logical Volume Manager (LVM), Microsoft Product Family, Microsoft Windows Azure, Problem Solving Skills, Protective Services, Public Health, Red Hat Linux Operating System, SSH (Secure Shell), SSL-TLS (Secure Socket Layer - Transport Layer Security), Security Policy, Software Development, Software Patches, Systems Administration/Management, Technical Strategy, Ubuntu, VMS Operating System, Virtual Machine (VM), Windows PowerShell, XFS ## Description The Senior Linux System Administrator will be responsible for operating, maintaining, securing, and automating Red Hat, Ubuntu, and other Linux systems across on-premises and Azure environments, including Azure Commercial/GCC and Azure Government., * Administer, configure, troubleshoot, and maintain production and non-production RHEL and Ubuntu servers and VMs. * Perform CIS-aligned Linux security hardening and remediation. * Work with Microsoft Defender for Cloud and Azure Policy for security posture and compliance. * Manage Ubuntu patching using Ubuntu Pro, Livepatch, ESM, and APT. * Develop and maintain automation using Bash and PowerShell, including Cron-based scheduled jobs. * Support Azure DevOps repositories, pipelines, CI/CD workflows, and Linux-based deployments. * Support Docker workloads running on standalone Linux VMs. * Integrate container workloads with Azure Key Vault and Azure Container Registry (ACR). * Manage SSSD identity integration, sudoers governance, and PAM configuration. * Administer LVM, XFS/EXT4 filesystems, partitions, and dedicated mounts such as /var, /tmp, and /var/log/audit. * Support audit findings, auditd logging, compliance activities, and cybersecurity initiatives. * Troubleshoot and optimize Linux systems while maintaining security and availability. ## Related Videos - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [From clicks to cribs - How to find your dream home with web scraping](https://www.wearedevelopers.com/videos/767-from-clicks-to-cribs-how-to-find-your-dream-home-with-web-scraping) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Hacking MSSQL on Cloud. 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