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!