> Markdown version of [/jobs/ext/2547048-systems-administrator-senior](https://www.wearedevelopers.com/jobs/ext/2547048-systems-administrator-senior). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Systems Administrator - Senior - **Company:** W3Global Inc - **Location:** Chantilly, VA, United States - **Experience:** Expert - **Salary:** $140,000.0 - $165,000.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Microsoft Windows, Confluence, JIRA, Unix, CentOS, Cloud Computing, Information Systems, Computer Networks, Linux, Monitoring of Systems, Identity and Access Management, Java Web Services, Network Troubleshooting, Linux System Administration, Windows Servers, Network Administration, Cisco Nexus Switches, OpenShift, Oracle (Applications), Platform as a Service (PAAS), Server Administration, Systems Architecture, VMware Infrastructure, Enterprise Software Applications, Computer Network Operations, System Availability, Software Troubleshooting, Gitlab, Infrastructure Automation Frameworks, Information Technology, Patch Management, Bitbucket, Devsecops, Server Operating Systems & Platforms, Jenkins, User Accounts - **Published:** August 3, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=6888a6971a6f2552 ## About the Role * Active Top Secret/SCI Security Clearance with CI Polygraph. * DoD 8570 IAT/IAM Level II Certification. * Experience supporting enterprise Windows and UNIX/Linux environments. * Strong understanding of enterprise infrastructure and systems administration. * Experience working within DevSecOps environments. * Knowledge of Oracle and/or CentOS architecture. * Experience with cloud infrastructure and Platform as a Service (PaaS). * Familiarity with OpenShift environments. * Working knowledge of Java-based applications. * Experience using GitLab, Bitbucket, Jenkins, Nexus, Jira, and Confluence. * Strong troubleshooting and analytical skills. * Ability to prioritize multiple tasks in a fast-paced environment. * Excellent verbal and written communication skills., * Bachelor's Degree in Information Technology, Computer Science, Information Systems, or a related discipline. * 10+ years of enterprise systems administration experience. * Experience supporting Intelligence Community or Department of Defense programs. * Strong understanding of enterprise architecture and secure infrastructure. * Experience with risk management and compliance. * Knowledge of mission-critical application support., * Windows Server * UNIX * Linux * CentOS Cloud & Infrastructure * Cloud Platforms * OpenShift * Platform as a Service (PaaS) * Enterprise Infrastructure * Server Administration * Storage Administration * Network Administration, * GitLab * Bitbucket * Jenkins * Nexus * Jira * Confluence Technologies * Oracle * Java * System Monitoring * Capacity Planning * Infrastructure Automation * Network Troubleshooting, * Strong analytical and problem-solving abilities. * Excellent communication and interpersonal skills. * Ability to work independently and within cross-functional teams. * Strong organizational and time-management skills. * Detail-oriented with excellent documentation practices. * Adaptable and able to manage multiple priorities. * Continuous learning mindset., * High School Diploma/GED with 16+ years of relevant experience, or * Associate Degree with 14+ years of relevant experience, or * Bachelor's Degree with 12+ years of relevant experience, or * Master's Degree with 10+ years of relevant experience., The ideal candidate is a senior systems administrator with extensive experience managing secure enterprise Windows and Linux environments, supporting DevSecOps operations, and maintaining mission-critical infrastructure. Candidates should possess an active TS/SCI clearance with CI Polygraph, strong troubleshooting expertise, and experience working within highly secure government or defense environments. ## Description We are seeking an experienced Senior Systems Administrator to support mission-critical enterprise applications, infrastructure, and platform services within a secure government environment. The ideal candidate will be responsible for maintaining, troubleshooting, and enhancing Windows and UNIX/Linux-based systems while ensuring high availability, security, and operational efficiency. This role requires expertise in enterprise infrastructure, DevSecOps environments, system administration, network operations, and cloud technologies supporting highly secure environments., * Administer and maintain Windows and UNIX/Linux server environments. * Install, configure, and support operating systems and enterprise applications. * Monitor system performance, availability, and overall infrastructure health. * Troubleshoot hardware, software, storage, network, and operating system issues. * Provide Tier 1 and Tier 2 technical support for enterprise systems. * Manage user accounts, permissions, and system security. * Support server, storage, networking, and virtual infrastructure. * Configure and maintain enterprise network components. * Perform system upgrades, patch management, and operating system enhancements. * Analyze system performance and conduct capacity planning. * Integrate new technologies into existing enterprise environments. * Support DevSecOps processes and infrastructure automation. * Collaborate with engineering teams on system architecture and deployment activities. * Maintain documentation, procedures, and technical runbooks. * Participate in training, knowledge sharing, and continuous process improvement. * Escalate critical incidents and communicate status to stakeholders. ## Related Videos - [My journey into DevOps world - How it all started!](https://www.wearedevelopers.com/videos/545-my-journey-into-devops-world-how-it-all-started) - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [WeAreDevelopers LIVE - Node and Package Security](https://www.wearedevelopers.com/videos/2138-wearedevelopers-live-node-and-package-security) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Collaboration Quantified: Lessons from Open Source Developer Networks](https://www.wearedevelopers.com/videos/1422-collaboration-quantified-lessons-from-open-source-developer-networks) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [System change: restart as developer?](https://www.wearedevelopers.com/magazine/39-system-change-restart-as-developer) - [A Guide to Green Tech and Green IT Careers](https://www.wearedevelopers.com/magazine/374-a-guide-to-green-tech-and-green-it-careers)