Senior Systems Administrator

Senior Systems Administrator | Collinsville, IL, United States | Hybrid | $92,300.00 - $166,850.00 We're hiring on behalf of a globally recognized technology leader that serves government and commercial clients with advanced digital and mission innovations. This organization is known for its commitment to pushing boundaries and outperforming the status quo to meet critical national security demands. The Role • Lead system administration for Linux and Windows-based systems in secure, mission-critical environments. • Architect and manage complex server, storage, and virtualization infrastructure (VMware, KVM). • Perform OS installation, configuration, hardening, and patching in compliance with security standards and policies. • Monitor and tune system performance, conduct root cause analysis, and resolve complex issues efficiently. • Support backup/recovery strategies, disaster recovery plans, and continuity of operations. • Oversee and maintain automation scripts and infrastructure as code (Ansible, PowerShell, Bash, etc.). What You'll Need • US citizenship is required per contract. • Bachelor’s degree in a relevant technical field with 8-12 years of relevant experience, or equivalent experience in lieu of a degree. • Active Top Secret clearance with the ability to obtain TS/SCI with Polygraph. • DoD 8570 IAT Level II or III certification (e.g., Security+ CE, CASP+, CISSP). • Experience with Linux (Red Hat Enterprise Linux or CentOS) and Windows Server platform system administration. • Proficiency with virtualization platforms (VMware, KVM) and automation/scripting tools (Ansible, Bash, PowerShell, Python). What's On Offer • Competitive compensation package with a salary range of $92,300.00 - $166,850.00. • Comprehensive benefits including Health and Wellness programs, Income Protection, Paid Leave, and Retirement. • Opportunity to work on mission-critical systems supporting vital national security initiatives. • A dynamic environment that values innovation, disruption, and forward-thinking solutions. Apply via Haystack today!