Senior Systems Administrator

Senior Systems Administrator | Columbia, IL, United States | Hybrid | $92,300.00 - $166,850.00 We're hiring on behalf of a prominent leader in technology-enabled services and mission software, renowned for supporting critical defense and intelligence missions. This organization is dedicated to providing cutting-edge tools and technologies to address complex security challenges and protect vital assets. They foster an environment of innovation and expertise, seeking individuals who thrive in dynamic, mission-focused settings. 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 stringent security standards. • Monitor and tune system performance, conduct root cause analysis, and resolve complex issues. • Oversee and maintain automation scripts and infrastructure as code (e.g., Ansible, PowerShell, Bash). • Provide Tier 2/3 technical support and contribute to system enhancement initiatives. What You'll Need • Bachelor’s degree in a relevant field with 8-12 years of progressive experience, or equivalent combination of education and experience. • 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). • Significant experience with virtualization platforms and automation/scripting tools. • Proficiency in Linux (Red Hat Enterprise Linux or CentOS) and Windows Server administration. • Familiarity with secure system hardening, compliance standards, and support for classified environments. What's On Offer • Opportunity to work on mission-critical systems impacting national security. • Collaborative environment with cross-functional teams (cybersecurity, network engineering, software development). • Competitive salary and comprehensive benefits package. • Professional development and advancement opportunities within a leading technology organization. Apply via Haystack today!