> Markdown version of [/jobs/ext/1925940-senior-systems-administrator-helpdesk-engineer-in-caseyville](https://www.wearedevelopers.com/jobs/ext/1925940-senior-systems-administrator-helpdesk-engineer-in-caseyville). 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). --- # Senior Systems Administrator/Helpdesk Engineer in Caseyville - **Company:** Energy Jobline - **Location:** Caseyville, IL, United States - **Experience:** Expert - **Salary:** $92,300.0 - $166,850.0 - **Contract:** Permanent contract - **Skills:** Agile Methodology, Amazon Web Services, Data Analysis, Automation of Tests, Microsoft Azure, Bash Shell, CentOS, Software Documentation, Cyber Security, Data as a Services, Linux, Identity and Access Management, Python (Programming Language), Kernel-Based Virtual Machine, Windows Servers, Windows PowerShell, Red Hat Enterprise Linux, Ansible, Software Engineering, Virtualization Technology, HybridCloud, Information Technology, Vmware - **Published:** August 5, 2026 - **Apply:** https://www.energyjobline.com/job/senior-systems-administrator-helpdesk-engineer-caseyville-31346956 ## About the Role Are you ready to be the technical backbone of a mission that matters? Leidos is seeking a highly motivated Senior Systems Administrator/Help Desk Engineer to support a cutting-edge Agile software development program, Chinook, for an Intelligence Community customer. In this critical role, you'll ensure the stability, security, and performance of the environments that enable mission users and Agile teams to deliver capabilities that directly support security., This position requires deep technical expertise, proactive leadership, and the ability to work independently and collaboratively in a fast-paced, classified environment. You will lead systems operations, and ensure availability, reliability, and security of infrastructure supporting geospatial analytics, software development, and data services., Active Top Secret/SCI with the ability to successfully pass a Polygraph examination., * Bachelor's degree in Computer Science, Engineering, Information Technology, or related discipline and 8-12 years of prior relevant experience or Master's with 6-10 years of prior relevant experience. \n * DoD 8570 IAT Level II or III certification (e.g., Security+ CE, CASP+, CISSP). \n * Experience with cloud platforms (AWS GovCloud, Azure Government) and hybrid cloud environments. \n * Experience with Linux (Red Hat Enterprise Linux or CentOS) and Windows Server platform system administration. \n * Proficiency with virtualization platforms (VMware, KVM) and management tools. \n * Experience with automation and scripting (Ansible, Bash, PowerShell, Python). \n * Familiarity with STIG compliance, system hardening, ACAS scans, and RMF processes. \n * Strong understanding of enterprise networking, /access management, and storage concepts. \n * Proven ability to troubleshoot, document, and lead systems-related projects independently. ## Description n \n * Lead system administration for Linux and Windows-based systems in secure, mission-critical environments. \n * Diagnose and resolve hardware, software, and end-user technical issues while serving as a primary IT support contact, managing support tickets through resolution, and delivering responsive customer service. \n * Architect and manage complex server, storage, and virtualization infrastructure (VMware, KVM). \n * Perform OS installation, configuration, hardening, and patching in compliance with DoD STIGs and agency policies. \n * Monitor and tune system performance, conduct root cause analysis, and resolve complex issues quickly and efficiently. \n * Support backup/recovery strategies, disaster recovery plans, and continuity of operations. \n * Oversee and maintain automation scripts and infrastructure as code (Ansible, PowerShell, Bash, etc.). \n * Maintain system documentation, configuration baselines, and support CM and RM activities. \n * Lead and support deployment of system enhancements and modernization initiatives for Chinook program. \n * Collaborate with cybersecurity, network engineering, and software development teams to ensure system compliance and performance. \n * Participate in security audits, incident response, and operational readiness activities. \n ## Related Videos - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Generating code with Angular schematics](https://www.wearedevelopers.com/videos/129-generating-code-with-angular-schematics) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [You can’t hack what you can’t see](https://www.wearedevelopers.com/videos/41-you-can-t-hack-what-you-can-t-see) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [A Guide to Green Tech and Green IT Careers](https://www.wearedevelopers.com/magazine/374-a-guide-to-green-tech-and-green-it-careers) - [7 Important Tips That Every Software Developer Should Know](https://www.wearedevelopers.com/magazine/101-7-important-tips-that-every-software-developer-should-know)