Senior Systems Administrator

Senior Systems Administrator | Edwardsville, IL, United States | Hybrid | $92,300.00 - $166,850.00 We're hiring on behalf of a leader in technology-enabled services and mission software, known for supporting critical defense and intelligence missions. This employer is at the forefront of cyber, logistics, security operations, and decision analytics, providing customers with the advanced tools and technologies needed to navigate a complex global security landscape. They are seeking a skilled professional to join a dedicated IT operations team focused on high-performance, mission-critical systems. 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 DoD STIGs and agency policies. • 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 (Ansible, PowerShell, Bash, etc.). What You'll Need • Active Top Secret clearance with the ability to obtain TS/SCI with Polygraph. • Bachelor’s degree in a relevant field with 8-12 years of experience, or equivalent experience in lieu of a degree. • DoD 8570 IAT Level II or III certification (e.g., Security+ CE, CASP+, CISSP). • Experience with cloud platforms (AWS GovCloud, Azure Government) and hybrid cloud environments. • Proficiency with Linux (Red Hat Enterprise Linux or CentOS) and Windows Server administration. • Experience with automation and scripting (Ansible, Bash, PowerShell, Python). What's On Offer • Competitive compensation package with a comprehensive benefits program. • Opportunity to work on mission-critical systems supporting national security. • Professional development and growth within a leading technology organization. • A collaborative environment with a focus on innovation and mission success. Apply via Haystack today!