Senior Systems Administrator

Senior Systems Administrator | East Carondelet, IL | Hybrid | $92,300.00 - $166,850.00 This employer is a leader in technology-enabled services and mission software, supporting defense and intelligence customers with innovative solutions. They are seeking a skilled Senior Systems Administrator to manage high-performance, mission-critical systems within a classified environment. The role offers the opportunity to shape and secure vital infrastructure for intelligence and geospatial initiatives. 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 compliant with DoD STIGs. • Monitor and tune system performance, conduct root cause analysis, and resolve complex issues. • Oversee backup/recovery strategies and disaster recovery planning. • Lead system enhancement and modernization initiatives. What You'll Need • 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 administration. • Proficiency with virtualization platforms (VMware, KVM). • Experience with automation and scripting (Ansible, Bash, PowerShell, Python). • Strong understanding of enterprise networking, identity/access management, and storage concepts. What's On Offer • Competitive salary within the range of $92,300.00 - $166,850.00. • Opportunity to work on mission-critical systems supporting national security. • Professional development in a dynamic and secure environment. • Collaborative team culture focused on innovation and outperformance. Apply via Haystack today!