Senior Systems Administrator

Senior Systems Administrator | Granite City, IL, US | Hybrid | $92,300.00 - $166,850.00 This employer is a globally recognized leader in technology and innovation, serving government and commercial clients with mission-critical solutions. They are known for their forward-thinking approach and commitment to impactful work, fostering an environment where employees can truly make a difference in challenging and evolving security landscapes. The Role • Lead system administration for both Linux and Windows-based systems in secure, mission-critical environments. • Architect, manage, and maintain 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 for complex issues, and implement efficient resolutions. • Oversee and maintain automation scripts and infrastructure as code for enhanced operational efficiency. • Collaborate with cybersecurity, network engineering, and development teams to ensure compliance and optimize performance. What You'll Need • US citizenship and an active Top Secret clearance with the ability to obtain TS/SCI with Polygraph. • Bachelor’s degree in a relevant field (or equivalent experience) with 8-12 years of experience. • DoD 8570 IAT Level II or III certification (e.g., Security+ CE, CASP+, CISSP). • Proven experience with Linux and Windows Server administration, virtualization platforms, and automation/scripting tools. • Familiarity with security compliance, system hardening, and RMF processes. • Strong understanding of enterprise networking, identity management, and storage concepts. What's On Offer • Competitive salary and comprehensive benefits package including health and wellness programs, income protection, and retirement plans. • Opportunity to work on mission-critical systems supporting intelligence and geospatial initiatives. • A collaborative environment that encourages technical leadership and professional growth within a leading technology organization. • Exposure to cutting-edge technologies and hybrid cloud environments. Apply via Haystack today!