Senior Systems Administrator

Senior Systems Administrator | Roxana, IL, United States | Hybrid | $92,300.00 - $166,850.00 This employer is a globally recognized leader in technology-driven solutions for government and commercial sectors, known for its innovation and commitment to mission success. They are seeking a highly skilled Senior Systems Administrator to manage critical, high-performance systems supporting national security initiatives within a classified environment. The Role • Lead system administration for both Linux and Windows-based systems in secure, mission-critical environments. • Architect, manage, and optimize complex server, storage, and virtualization infrastructure. • Perform OS installation, configuration, hardening, and patching in compliance with stringent security standards. • Monitor and tune system performance, conduct root cause analysis, and resolve complex issues. • Support backup/recovery strategies, disaster recovery plans, and continuity of operations. • Oversee and maintain automation scripts and infrastructure as code. What You'll Need • Bachelor’s degree in a relevant field with 8-12 years of experience, or equivalent experience in lieu of 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). • Proven experience with Linux (Red Hat Enterprise Linux, CentOS) and Windows Server platforms. • Proficiency with virtualization platforms (VMware, KVM) and automation/scripting tools (Ansible, Bash, PowerShell, Python). • Experience supporting IC or DoD classified environments and familiarity with STIG compliance. What's On Offer • Competitive salary range and comprehensive benefits package. • Opportunity to work on mission-critical projects with significant impact. • Professional development and collaboration with expert teams. • A dynamic environment that values proactive leadership and technical expertise. Apply via Haystack today!