Senior Systems Administrator

Senior Systems Administrator | Saint Charles, MO, United States | Hybrid | $92,300.00 - $166,850.00 We're hiring on behalf of a leading technology company that provides technology-enabled services and mission software capabilities to defense and intelligence customers. Their team is dedicated to equipping clients with the tools and technologies necessary to navigate an evolving security landscape and protect critical assets. 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. • Perform OS installation, configuration, hardening, and patching in compliance with 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 • US citizenship required with the ability to obtain a Top Secret security clearance with SCI and Polygraph. • Bachelor’s degree in a relevant field with 8-12 years of experience, or equivalent years of 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 platform system administration. • Experience with automation and scripting (Ansible, Bash, PowerShell, Python). What's On Offer • Competitive compensation package. • Comprehensive health and wellness programs. • Opportunities for professional development and advancement within a mission-focused organization. • A collaborative work environment supporting critical national security initiatives. Apply via Haystack today!